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Grade 7 Math · Tax, Discounts and Simple Interest

Grade 7 Tax, Discounts and Simple Interest Practice Test

Build Grade 7 Math skills with five 10-question practice tests on sales tax, discounts, combined price changes, and simple interest.

Tax, Discounts and Simple Interest Practice Tests

These Grade 7 Math practice tests help students apply percentages to purchases and financial situations. Students work with sales tax, discounts, original and final prices, combined discount-and-tax calculations, and simple interest.

Skills covered

  • Finding sales tax and total purchase costs
  • Calculating discounts and sale prices
  • Applying a discount and tax in the correct order
  • Finding an original price, tax rate, or discount rate
  • Using the simple-interest formula I = Prt
  • Finding principal, rate, time, interest, and total amount

How to use these practice tests

Convert each percentage to a decimal before multiplying. Apply a discount to the original price first, then calculate tax on the discounted price when the problem gives both. For simple interest, use I = Prt, where P is the principal, r is the annual rate as a decimal, and t is time in years.

For more Grade 7 Math practice, return to the Grade 7 Math category.

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1. Test

Grade 7 Tax, Discounts and Simple Interest Practice Tests

A 10-question Grade 7 Math practice test on sales tax, discounts, combined price changes, and simple interest.

Convert percentages to decimals, apply tax or discount to the correct price, and use the simple-interest formula I = Prt when appropriate.

10 Questions
0/10 Questions0 %
Correct 0
Incorrect 0
Unanswered 10
1. QuestionMultiple choice

A $40 purchase has 6%6\% sales tax. What is the total cost?

Please select an answer first.

Correct answer: A

The correct answer is $42.40.

  1. Identify the values and rate: Separate the original price or principal from the tax, discount, interest rate, and time information.
  2. Apply the appropriate formula: The tax is 0.06⋅40=2.400.06\cdot40=2.40, so the total is 40+2.40=42.4040+2.40=42.40 dollars.
  3. Check the result: Estimate the percentage of the original amount and confirm that the result is reasonable.

The tax is 0.06⋅40=2.400.06\cdot40=2.40, so the total is 40+2.40=42.4040+2.40=42.40 dollars.

2. QuestionMultiple choice

A $75 purchase has 8%8\% sales tax. What is the total cost?

Please select an answer first.

Correct answer: B

The correct answer is $81.00.

  1. Identify the values and rate: Separate the original price or principal from the tax, discount, interest rate, and time information.
  2. Apply the appropriate formula: The tax is 0.08⋅75=60.08\cdot75=6, so the total is 75+6=8175+6=81 dollars.
  3. Check the result: Estimate the percentage of the original amount and confirm that the result is reasonable.

The tax is 0.08⋅75=60.08\cdot75=6, so the total is 75+6=8175+6=81 dollars.

3. QuestionMultiple choice

A $120 item is discounted by 15%15\%. What is the sale price?

Please select an answer first.

Correct answer: C

The correct answer is $102.

  1. Identify the values and rate: Separate the original price or principal from the tax, discount, interest rate, and time information.
  2. Apply the appropriate formula: The discount is 0.15⋅120=180.15\cdot120=18, so the sale price is 120−18=102120-18=102 dollars.
  3. Check the result: Estimate the percentage of the original amount and confirm that the result is reasonable.

The discount is 0.15⋅120=180.15\cdot120=18, so the sale price is 120−18=102120-18=102 dollars.

4. QuestionMultiple choice

A $250 item is discounted by 20%20\%. What is the sale price?

Please select an answer first.

Correct answer: D

The correct answer is $200.

  1. Identify the values and rate: Separate the original price or principal from the tax, discount, interest rate, and time information.
  2. Apply the appropriate formula: The discount is 0.20⋅250=500.20\cdot250=50, so the sale price is 250−50=200250-50=200 dollars.
  3. Check the result: Estimate the percentage of the original amount and confirm that the result is reasonable.

The discount is 0.20⋅250=500.20\cdot250=50, so the sale price is 250−50=200250-50=200 dollars.

5. QuestionMultiple choice

A $60 purchase has 5%5\% sales tax. What is the total cost?

Please select an answer first.

Correct answer: A

The correct answer is $63.

  1. Identify the values and rate: Separate the original price or principal from the tax, discount, interest rate, and time information.
  2. Apply the appropriate formula: The tax is 0.05⋅60=30.05\cdot60=3, so the total is 60+3=6360+3=63 dollars.
  3. Check the result: Estimate the percentage of the original amount and confirm that the result is reasonable.

The tax is 0.05⋅60=30.05\cdot60=3, so the total is 60+3=6360+3=63 dollars.

6. QuestionMultiple choice

An $80 item is discounted by 25%25\%. What is the sale price?

Please select an answer first.

Correct answer: B

The correct answer is $60.

  1. Identify the values and rate: Separate the original price or principal from the tax, discount, interest rate, and time information.
  2. Apply the appropriate formula: The discount is 0.25⋅80=200.25\cdot80=20, so the sale price is 80−20=6080-20=60 dollars.
  3. Check the result: Estimate the percentage of the original amount and confirm that the result is reasonable.

The discount is 0.25⋅80=200.25\cdot80=20, so the sale price is 80−20=6080-20=60 dollars.

7. QuestionMultiple choice

A $35 purchase has 10%10\% sales tax. What is the total cost?

Please select an answer first.

Correct answer: C

The correct answer is $38.50.

  1. Identify the values and rate: Separate the original price or principal from the tax, discount, interest rate, and time information.
  2. Apply the appropriate formula: The tax is 0.10⋅35=3.500.10\cdot35=3.50, so the total is 35+3.50=38.5035+3.50=38.50 dollars.
  3. Check the result: Estimate the percentage of the original amount and confirm that the result is reasonable.

The tax is 0.10⋅35=3.500.10\cdot35=3.50, so the total is 35+3.50=38.5035+3.50=38.50 dollars.

8. QuestionMultiple choice

A $90 item is discounted by 30%30\%. What is the sale price?

Please select an answer first.

Correct answer: D

The correct answer is $63.

  1. Identify the values and rate: Separate the original price or principal from the tax, discount, interest rate, and time information.
  2. Apply the appropriate formula: The discount is 0.30⋅90=270.30\cdot90=27, so the sale price is 90−27=6390-27=63 dollars.
  3. Check the result: Estimate the percentage of the original amount and confirm that the result is reasonable.

The discount is 0.30⋅90=270.30\cdot90=27, so the sale price is 90−27=6390-27=63 dollars.

9. QuestionMultiple choice

A $200 purchase has 7.5%7.5\% sales tax. What is the total cost?

Please select an answer first.

Correct answer: A

The correct answer is $215.

  1. Identify the values and rate: Separate the original price or principal from the tax, discount, interest rate, and time information.
  2. Apply the appropriate formula: The tax is 0.075⋅200=150.075\cdot200=15, so the total is 200+15=215200+15=215 dollars.
  3. Check the result: Estimate the percentage of the original amount and confirm that the result is reasonable.

The tax is 0.075⋅200=150.075\cdot200=15, so the total is 200+15=215200+15=215 dollars.

10. QuestionMultiple choice

A $160 item is discounted by 12.5%12.5\%. What is the sale price?

Please select an answer first.

Correct answer: B

The correct answer is $140.

  1. Identify the values and rate: Separate the original price or principal from the tax, discount, interest rate, and time information.
  2. Apply the appropriate formula: The discount is 0.125⋅160=200.125\cdot160=20, so the sale price is 160−20=140160-20=140 dollars.
  3. Check the result: Estimate the percentage of the original amount and confirm that the result is reasonable.

The discount is 0.125⋅160=200.125\cdot160=20, so the sale price is 160−20=140160-20=140 dollars.

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Frequently asked questions about Grade 7 Tax, Discounts and Simple Interest

What topics are covered?

The page covers sales tax, discounts, final and original prices, combined price changes, simple interest, rates, principal, time, and total amount.

What formula is used for simple interest?

Use I = Prt, where I is interest, P is principal, r is the annual interest rate written as a decimal, and t is time in years.

How many questions are on this page?

The page includes five mini tests with 10 questions each, for 50 Grade 7 Tax, Discounts and Simple Interest questions in total.