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Simple interest: find the interest rate

Year 8 maths · 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/uk/practice/year-8/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