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Real estate math guide

Loan-to-value ratio from the right numerator and value base

LTV is a three-letter label for one fraction: loan over value. The exam challenge is deciding which loan and which value belong in that fraction. Write those labels before touching the calculator. Most LTV mistakes disappear when the numerator says debt and the denominator says property.

Last updated: August 1, 2026

What calculation do you need to make?

Short answer: LTV equals loan amount divided by the required property value, multiplied by 100. To find the maximum loan, multiply value by the decimal LTV. To find value, divide the loan by the decimal LTV. In a simple one-loan purchase using price as value, down-payment percentage is 100% minus LTV. In actual underwriting, the value base and included loan amounts follow program rules. For many Fannie Mae purchase loans, the value base is the lower of sales price or current appraised value. LTV generally addresses the first mortgage, CLTV adds applicable subordinate debt, and HCLTV can use the full home-equity line limit. Do not import a loan-program cutoff unless the question states it.

Official section
National XI.D: PITI, Equity, LTV, Points, and Origination Fees
Broker weight
A named calculation within 7% of the national portion
Expected scored items
The current PSI broker outline assigns about 7 of 100 scored national items to Real Estate Math

This is exam math, not mortgage approval guidance. Current underwriting can apply product-specific value definitions, maximum ratios, occupancy rules, mortgage-insurance treatment, subordinate-financing rules, rounding conventions, appraisal requirements, and automated findings. Approval can also turn on credit, income, assets, reserves, property eligibility, documentation, and the borrower's requested terms, none of which a correct LTV result resolves by itself or guarantees approval. Fannie Mae examples help show why denominator selection matters, but they do not govern every loan. Special rules can apply to construction, renovation, shared-equity, manufactured-housing, and other transactions. Use the ratio, loan category, property value, and rounding instruction stated in the problem. Sources were checked through August 1, 2026.

How do you solve a loan-to-value problem?

  1. Underline the requested result: LTV, maximum loan, required value, down payment, CLTV, or HCLTV.
  2. Label the debt numerator as original first loan, current first balance, total liens, or full credit-line exposure.
  3. Label the denominator as stated value, current value, sales price, appraised value, or the lower amount required by the problem.
  4. Write the equation in words before entering numbers: loan divided by value, loan equals value times LTV, or value equals loan divided by LTV.
  5. Convert a given percentage to a decimal when multiplying or dividing to recover a missing amount.
  6. Calculate with full precision and follow the problem's final rounding instruction.
  7. Check direction: more debt raises LTV, more value lowers LTV, and a larger down payment ordinarily lowers LTV.
  8. State the result without inventing an approval threshold, mortgage-insurance rule, or loan-program conclusion.
Unknown
LTV
Formula
Loan / required value x 100
Exam safeguard
Debt over property
Unknown
Maximum loan
Formula
Required value x decimal LTV
Exam safeguard
Multiply by limit
Unknown
Required value
Formula
Loan / decimal LTV
Exam safeguard
Divide by rate
Unknown
Down payment dollars
Formula
Purchase price - purchase loan
Exam safeguard
Deposit is not subtracted
Unknown
Simple down-payment rate
Formula
100% - LTV
Exam safeguard
Same base and one loan only
Unknown
Current LTV
Formula
Current balance / current value
Exam safeguard
Match dates
Unknown
CLTV
Formula
Applicable secured balances / value
Exam safeguard
Include stated subordinate debt
Unknown
HCLTV
Formula
Debt plus full HELOC limit / value
Exam safeguard
Use full line when required
Unknown
Dollar equity
Formula
Value - secured balances
Exam safeguard
Dollars, not ratio
Unknown
Ratio over 100%
Formula
Debt exceeds value
Exam safeguard
May be mathematically valid

Can you follow the calculation from facts to answer?

Calculate a basic LTV

Scenario: A property has the required value of $400,000 and secures a $340,000 loan. What is the LTV?

  1. Write loan over value: $340,000 / $400,000.
  2. The quotient is 0.85.
  3. Convert 0.85 to 85%.

Answer: The loan-to-value ratio is 85%.

Use the lower purchase value when required

Scenario: A program uses the lower of price or appraised value. The price is $425,000, the appraisal is $410,000, and the loan is $328,000. What is the LTV?

  1. The required denominator is $410,000 because it is lower.
  2. $328,000 / $410,000 = 0.80.
  3. Using $425,000 would answer a different ratio.

Answer: The program LTV is 80%.

Find a maximum loan

Scenario: The eligible property value is $460,000 and the stated maximum LTV is 75%. What is the maximum loan?

  1. Convert 75% to 0.75.
  2. $460,000 x 0.75 = $345,000.
  3. Check: $345,000 / $460,000 = 75%.

Answer: The maximum loan is $345,000.

Recover the required value

Scenario: A $288,000 loan represents 80% LTV. What property value is used?

  1. Value is the missing denominator.
  2. $288,000 / 0.80 = $360,000.
  3. Multiplying back gives $360,000 x 0.80 = $288,000.

Answer: The required property value is $360,000.

Separate down payment from a low appraisal

Scenario: A buyer contracts at $500,000 and borrows $400,000. The appraisal is $480,000, and the problem requires the lower value for LTV. Find the cash down payment and LTV.

  1. Contract down payment is $500,000 - $400,000 = $100,000.
  2. The LTV denominator is $480,000, not the $500,000 price.
  3. $400,000 / $480,000 = 0.8333, or about 83.33%.

Answer: The down payment is $100,000 and the LTV is about 83.33%.

Compare LTV, CLTV, and HCLTV

Scenario: A $400,000 property has a $280,000 first mortgage, a $40,000 closed-end second, and a HELOC with $10,000 drawn on a $30,000 limit. Use the stated definitions to calculate the three ratios.

  1. LTV is $280,000 / $400,000 = 70%.
  2. CLTV is ($280,000 + $40,000 + $10,000) / $400,000 = 82.5%.
  3. HCLTV is ($280,000 + $40,000 + $30,000) / $400,000 = 87.5%.

Answer: LTV is 70%, CLTV is 82.5%, and HCLTV is 87.5%.

Which math errors cost the most points?

Trap
Divide property value by the loan amount.
Correction
LTV is loan divided by value. Say debt over property before entering the fraction.
Trap
Use the sale price as the denominator in every transaction.
Correction
Use the value definition stated; a purchase program can require the lower of price or appraisal.
Trap
Use appraised value in every simple exam problem even when another value is expressly supplied.
Correction
Follow the question's value base instead of importing an underwriting rule without permission.
Trap
Multiply the loan by the LTV to find value.
Correction
When value is missing, divide loan by the decimal LTV.
Trap
Divide value by the maximum LTV to find the maximum loan.
Correction
Multiply value by the maximum decimal ratio.
Trap
Treat earnest money as reducing the total down payment.
Correction
Earnest money can reduce cash still due, but total price minus loan still defines the simple down payment.
Trap
Assume 80% LTV always means exactly 20% cash down.
Correction
That complement requires one loan and the same value base; a low appraisal or other financing can change the relationship.
Trap
Use only the first mortgage when CLTV is requested.
Correction
Add the relevant subordinate secured debt identified by the problem.
Trap
Use only the drawn HELOC balance for HCLTV.
Correction
HCLTV generally captures the full line limit under the supplied definition.
Trap
Mix an original loan amount with a current property value.
Correction
Match the time frame unless the question deliberately defines a different comparison.
Trap
Reject any LTV above 100% as a calculator error.
Correction
Debt can exceed value. Recheck the inputs, then accept a mathematically supported result.
Trap
Use one familiar LTV cutoff to decide every loan's eligibility.
Correction
Maximum ratios and related requirements vary by product and current underwriting rules.

Can you solve these original problems?

These questions are original study items aligned to the published outline. They are not copied, recalled, or predicted PSI questions.

1. A $315,000 loan is secured by a property with a required value of $420,000. What is the LTV?

  1. 75%
  2. 70%
  3. 80%
  4. 133.33%
Show answer and explanation

Answer: 75%

$315,000 / $420,000 = 0.75, or 75%.

2. A property value of $380,000 is subject to a stated maximum 85% LTV. What is the maximum loan?

  1. $323,000
  2. $447,058.82
  3. $304,000
  4. $57,000
Show answer and explanation

Answer: $323,000

$380,000 x 0.85 = $323,000.

3. A $270,000 loan represents 90% LTV. What is the required value?

  1. $300,000
  2. $243,000
  3. $297,000
  4. $30,000
Show answer and explanation

Answer: $300,000

$270,000 / 0.90 = $300,000.

4. A purchase program requires the lower of a $350,000 price and a $340,000 appraisal. Which LTV denominator should be used?

  1. $340,000
  2. $350,000
  3. $10,000
  4. The loan payment
Show answer and explanation

Answer: $340,000

The stated rule selects the lower property value, which is $340,000.

5. Which change lowers LTV when every other fact stays the same?

  1. A lower loan amount
  2. A lower property value
  3. A larger loan amount
  4. More subordinate debt in CLTV
Show answer and explanation

Answer: A lower loan amount

Reducing the numerator lowers the loan-to-value ratio when the denominator is unchanged.

Which numbers and formulas are easy to confuse?

Terms
Loan amount vs. property value
Difference
Loan amount is secured debt and belongs in the numerator. Property value is the collateral base and belongs in the denominator.
Question cue
Debt on top, property below.
Terms
LTV vs. down-payment percentage
Difference
LTV measures financed value. Down-payment percentage measures the buyer's price contribution and is complementary only in a simple matching-base purchase.
Question cue
Borrowed share versus buyer-funded share.
Terms
LTV vs. equity
Difference
LTV is a debt-to-value percentage. Equity is the value left after subtracting secured debt and can be expressed in dollars or as a percentage.
Question cue
Leverage ratio versus ownership remainder.
Terms
Original LTV vs. current LTV
Difference
Original LTV uses the relevant original loan and transaction value. Current LTV uses the current balance and a current value when requested.
Question cue
Closing snapshot versus present snapshot.
Terms
Purchase price vs. appraised value
Difference
Purchase price is contractual consideration. Appraised value is a supported value opinion; a program may select the lower amount for purchase LTV.
Question cue
Agreed price versus valuation conclusion.
Terms
LTV vs. CLTV
Difference
LTV generally focuses on the first mortgage. CLTV combines the applicable first and subordinate secured amounts.
Question cue
First lien ratio versus combined lien ratio.
Terms
CLTV vs. HCLTV
Difference
CLTV can use the outstanding home-equity line balance under the stated definition. HCLTV accounts for the full available line limit.
Question cue
Drawn exposure versus full line exposure.
Terms
Maximum LTV vs. calculated LTV
Difference
Maximum LTV is a stated eligibility ceiling. Calculated LTV is the ratio produced by the actual loan and value facts.
Question cue
Rule limit versus transaction result.
Terms
Loan balance vs. loan payment
Difference
Balance is principal debt used in an LTV numerator. Payment is a periodic cash-flow amount used in PITI or qualification ratios.
Question cue
Principal stock versus monthly flow.
Terms
LTV calculation vs. loan approval
Difference
The calculation produces one ratio. Approval considers the complete applicable underwriting standards and verified transaction file.
Question cue
Arithmetic output versus credit decision.

What does the outline expect you to calculate?

Topic
LTV meaning
What to know
Loan-to-value ratio, leverage, collateral, mortgage, secured debt, property value, percentage, lender risk, borrower contribution, and comparison
Best exam move
Translate LTV into the words loan divided by value before selecting numbers.
Topic
Loan numerator
What to know
Original loan amount, current balance, note amount, first mortgage, purchase loan, refinance loan, financed mortgage insurance, and stated debt
Best exam move
Use the loan amount the question names and do not replace an original amount with a current balance.
Topic
Value denominator
What to know
Sales price, appraised value, current value, market value, property value, acquisition cost, eligible value, lower value, and collateral base
Best exam move
Label the denominator with the exact value rule supplied by the question.
Topic
Basic LTV formula
What to know
Loan divided by value, decimal quotient, percentage conversion, numerator, denominator, fraction, calculator, and percent sign
Best exam move
Divide debt by property value and multiply the decimal by 100 only when expressing the result as a percentage.
Topic
Maximum loan
What to know
Eligible value, maximum LTV, loan ceiling, lender limit, decimal rate, multiplication, requested principal, and borrowing capacity
Best exam move
Multiply the required value base by the maximum decimal ratio.
Topic
Required property value
What to know
Known loan, stated LTV, missing denominator, algebra, division, appraisal target, value requirement, and reverse formula
Best exam move
Divide the loan by the decimal LTV because value is the missing denominator.
Topic
Down payment
What to know
Purchase price, loan amount, cash contribution, down-payment percentage, price gap, buyer funds, deposit, and financing
Best exam move
Subtract the purchase loan from price; do not subtract earnest money when finding the total down payment.
Topic
LTV and down-payment complement
What to know
100%, one loan, same price base, 80/20, complement, simple purchase, no financed cost, and shortcut limits
Best exam move
Use 100% minus LTV only when loan and down payment divide the same value base into the whole price.
Topic
Purchase value convention
What to know
Lower of sales price or appraised value, current appraisal, contract price, eligible property value, Fannie Mae, purchase transaction, and low appraisal
Best exam move
Apply the lower-value convention only when the question or relevant program requires it.
Topic
Refinance LTV
What to know
New original loan, current appraised value, rate-and-term, cash-out, old payoff, new principal, transaction value, and program rule
Best exam move
Use the new loan and the refinance value base stated, not the former purchase price.
Topic
Current LTV
What to know
Current principal balance, present property value, appreciation, depreciation, amortization, equity, sale analysis, and updated ratio
Best exam move
Pair current debt with current value rather than mixing dates.
Topic
CLTV
What to know
Combined loan-to-value, first mortgage, closed-end second, subordinate lien, HELOC drawn balance, total secured debt, and property value
Best exam move
Add only the secured loan amounts included by the stated CLTV definition, then divide once by value.
Topic
HCLTV
What to know
Home equity line, full credit limit, outstanding balance, first mortgage, subordinate financing, highest exposure, combined ratio, and unused line
Best exam move
Use the HELOC credit limit instead of merely its drawn balance when the requested HCLTV definition requires it.
Topic
Equity relationship
What to know
Value minus liens, dollar equity, equity percentage, current debt, negative equity, leverage, complementary percentages, and owner interest
Best exam move
Calculate dollar equity by subtraction; calculate LTV by division and keep the units distinct.
Topic
Ratios above 100%
What to know
Debt exceeds value, underwater property, negative equity, overleveraged, mathematical result, eligibility distinction, and reasonableness
Best exam move
Verify the inputs, then accept a ratio above 100% if the stated debt truly exceeds value.
Topic
Percentage and decimal conversion
What to know
80%, 0.80, decimal point, multiplication, division, quotient, whole percent, basis points, and calculator entry
Best exam move
Use the decimal form inside formulas and attach the percent sign only after conversion.
Topic
Rounding
What to know
Exact quotient, two decimals, whole percentage, truncate, round up, underwriting convention, exam instruction, and final answer
Best exam move
Follow the question's rounding direction because a loan program may use a different convention from ordinary exam rounding.
Topic
Underwriting boundary
What to know
Maximum allowable ratio, mortgage insurance, interest rate, loan product, credit, occupancy, units, eligibility matrix, and lender decision
Best exam move
Calculate the ratio requested without assuming that one familiar percentage approves or rejects every loan.

How should you drill this calculation?

Session
Session 1
Focus
Build the LTV fraction
Proof you are ready
Label loan and value correctly in 20 problems before calculating any quotient.
Session
Session 2
Focus
Reverse the formula
Proof you are ready
Solve ten unknown-loan and ten unknown-value problems, checking each by substitution.
Session
Session 3
Focus
Choose the value base
Proof you are ready
Resolve 20 price, appraisal, current-value, and lower-value scenarios with a written reason.
Session
Session 4
Focus
Connect down payment and equity
Proof you are ready
Explain when 100% minus LTV works and identify ten scenarios where the shortcut needs qualification.
Session
Session 5
Focus
Calculate combined ratios
Proof you are ready
Solve ten LTV, CLTV, and HCLTV sets with first liens, seconds, and HELOC limits.
Session
Session 6
Focus
Complete a mixed LTV set
Proof you are ready
Score at least 90% and justify every numerator, denominator, formula direction, and rounding choice.

Do not count recognition as mastery. Close the notes and explain the rule, apply it to a new fact pattern, and identify why each distractor fails.

Build speed without skipping the setup

From concept to decision

Drill this topic, then review the explanation

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Questions students ask about Loan-to-Value Ratio Formula: LTV Examples and Practice

What is the loan-to-value ratio formula?

LTV equals the loan amount divided by the required property value, multiplied by 100. A $270,000 loan divided by a $360,000 value is 0.75, or 75% LTV. Keep the fraction in that order: loan over value.

How do you calculate the maximum loan from an LTV limit?

Multiply the eligible property value by the maximum LTV expressed as a decimal. If the required value base is $400,000 and the stated maximum is 80%, the maximum loan is $400,000 times 0.80, or $320,000.

How do you find property value from the loan and LTV?

Divide the loan amount by the decimal LTV. If a $306,000 loan represents 85% LTV, value is $306,000 divided by 0.85, or $360,000. Multiplying the loan by 85% would answer the wrong question.

Do you use purchase price or appraised value for LTV?

Use the denominator required by the question or loan program. A simple exam problem may expressly name a value. For many Fannie Mae purchase transactions, property value is the lower of the sales price or current appraised value. That is an underwriting convention, not permission to invent the lower-value rule when an exam question supplies a different instruction.

Is 80% LTV the same as a 20% down payment?

It can be in a simple purchase where the sale price is the value base, there is one purchase loan, and no financed amount changes the setup. It is not a universal identity. A low appraisal, subordinate financing, financed mortgage insurance, or a different value definition can break the shortcut.

What is the difference between LTV and CLTV?

LTV usually compares the first mortgage with property value. Combined loan-to-value, or CLTV, compares the relevant first and subordinate secured debt with value. Read the problem's definitions because treatment of a home equity line can differ from the highest combined measure.

What is HCLTV?

HCLTV is a combined ratio that accounts for the full credit-line amount of a home equity line rather than only the amount currently drawn, together with the applicable mortgage balances. It can therefore be higher than CLTV. Use it only when the question supplies a HELOC limit or expressly asks for HCLTV.

Can LTV be greater than 100%?

Mathematically, yes. If the relevant debt exceeds the required property value, the ratio exceeds 100%. Do not automatically reject that result. Confirm the numerator and denominator, then report what the facts produce without assuming the loan would qualify.

Does a higher down payment lower LTV?

All else equal, yes. A larger down payment reduces the purchase loan, so the loan divided by the same value becomes smaller. The CFPB explains this inverse relationship, but the final loan terms still depend on the lender, program, borrower, property, and current underwriting rules.

Are these official Illinois broker exam questions?

No. They are original practice calculations aligned to the PSI Illinois broker outline effective June 24, 2026. The current PSI outline and official federal or government-sponsored enterprise materials were checked through August 1, 2026.

Primary sources

The current official outline controls the tested scope. Statutes, regulations, and official agency materials control when a general study rule and a jurisdiction-specific rule differ.

Editorial status

Checked against primary sources

The Pass Illinois editorial team last checked this guide on August 1, 2026. Every practice question is an original study item, and the source links above let you verify the rules that support the lesson.

Read our editorial and corrections process

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