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Simple interest: find the interest rate

Grade 7 math · Fieldbook Learning

Name ______________________ Date __________

Use interest = principal × rate × time, with the rate as a percent per year.

  1. $900 earns $36 simple interest in 2 years. What is the yearly interest rate? Write the percent only.
  2. $1000 earns $40 simple interest in 2 years. What is the yearly interest rate? Write the percent only.
  3. $400 earns $40 simple interest in 2 years. What is the yearly interest rate? Write the percent only.
  4. $800 earns $80 simple interest in 1 year. What is the yearly interest rate? Write the percent only.
  5. $500 earns $60 simple interest in 3 years. What is the yearly interest rate? Write the percent only.
  6. $500 earns $75 simple interest in 3 years. What is the yearly interest rate? Write the percent only.
  7. $1500 earns $75 simple interest in 1 year. What is the yearly interest rate? Write the percent only.
  8. $400 earns $60 simple interest in 3 years. What is the yearly interest rate? Write the percent only.
  9. $2500 earns $300 simple interest in 4 years. What is the yearly interest rate? Write the percent only.
  10. $800 earns $40 simple interest in 1 year. What is the yearly interest rate? Write the percent only.
  11. $2700 earns $405 simple interest in 5 years. What is the yearly interest rate? Write the percent only.
  12. $2000 earns $300 simple interest in 5 years. What is the yearly interest rate? Write the percent only.
  13. $2100 earns $84 simple interest in 2 years. What is the yearly interest rate? Write the percent only.
  14. $4300 earns $1075 simple interest in 5 years. What is the yearly interest rate? Write the percent only.
  15. $1300 earns $468 simple interest in 6 years. What is the yearly interest rate? Write the percent only.
  16. $3900 earns $1053 simple interest in 3 years. What is the yearly interest rate? Write the percent only.
  17. $9900 earns $3960 simple interest in 8 years. What is the yearly interest rate? Write the percent only.
  18. $2000 earns $1200 simple interest in 6 years. What is the yearly interest rate? Write the percent only.
  19. $3200 earns $896 simple interest in 7 years. What is the yearly interest rate? Write the percent only.
  20. $4300 earns $2064 simple interest in 6 years. What is the yearly interest rate? Write the percent only.
More free practice: fieldbooklearning.com/ca/practice/grade-7/simple-interest-find-the-interest-rate/

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Answer key: Simple interest: find the interest rate

  1. 2
  2. 2
  3. 5
  4. 10
  5. 4
  6. 5
  7. 5
  8. 5
  9. 3
  10. 5
  11. 3
  12. 3
  13. 2
  14. 5
  15. 6
  16. 9
  17. 5
  18. 10
  19. 4
  20. 8