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Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 375 · 40 sums
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The method (Grow it every year): Year by year: new amount = amount × (100 + R) ÷ 100. Amount after T years = P × (1 + R/100)ᵀ; compound interest = amount − P. A value falling by R% each year: × (100 − R) ÷ 100 every year. For 2 years, CI − SI = P × R × R ÷ 10000.

NameDateTime takenScore ___ / 40
  1. 1.Find the compound interest on ₹17600 at 8% per year for 1 year, compounded every year (in ₹).
  2. 2.What is the difference between the compound interest and the simple interest on ₹28800 at 20% per year for 2 years (in ₹)?
  3. 3.What amount will ₹35000 grow to in 2 years at 12% per year compound interest (in ₹)?
  4. 4.A town has 59200 people. The population grows by 25% every year. What will the population be after 2 years?
  5. 5.What amount will ₹38600 grow to in 1 year at 8% per year compound interest (in ₹)?
  6. 6.What is the difference between the compound interest and the simple interest on ₹42500 at 8% per year for 2 years (in ₹)?
  7. 7.What amount will ₹4500 grow to in 1 year at 25% per year compound interest (in ₹)?
  8. 8.A town has 32500 people. The population grows by 12% every year. What will the population be after 2 years?
  9. 9.Find the compound interest on ₹45000 at 12% per year for 2 years, compounded every year (in ₹).
  10. 10.A town has 33600 people. The population grows by 5% every year. What will the population be after 1 year?
  11. 11.What is the difference between the compound interest and the simple interest on ₹17500 at 8% per year for 2 years (in ₹)?
  12. 12.Find the compound interest on ₹40600 at 20% per year for 2 years, compounded every year (in ₹).
  13. 13.What amount will ₹56000 grow to in 3 years at 5% per year compound interest (in ₹)?
  14. 14.What amount will ₹42500 grow to in 2 years at 12% per year compound interest (in ₹)?
  15. 15.What amount will ₹40000 grow to in 3 years at 5% per year compound interest (in ₹)?
  16. 16.What is the difference between the compound interest and the simple interest on ₹7200 at 25% per year for 2 years (in ₹)?
  17. 17.What is the difference between the compound interest and the simple interest on ₹21200 at 25% per year for 2 years (in ₹)?
  18. 18.A town has 28100 people. The population grows by 5% every year. What will the population be after 1 year?
  19. 19.What amount will ₹10000 grow to in 2 years at 12% per year compound interest (in ₹)?
  20. 20.Find the compound interest on ₹32000 at 5% per year for 3 years, compounded every year (in ₹).
  21. 21.A town has 57900 people. The population grows by 5% every year. What will the population be after 1 year?
  22. 22.What is the difference between the compound interest and the simple interest on ₹35000 at 12% per year for 2 years (in ₹)?
  23. 23.What is the difference between the compound interest and the simple interest on ₹56900 at 10% per year for 2 years (in ₹)?
  24. 24.Find the compound interest on ₹5000 at 12% per year for 2 years, compounded every year (in ₹).
  25. 25.What is the difference between the compound interest and the simple interest on ₹47500 at 4% per year for 2 years (in ₹)?
  26. 26.Find the compound interest on ₹40000 at 5% per year for 3 years, compounded every year (in ₹).
  27. 27.A town has 26000 people. The population grows by 10% every year. What will the population be after 3 years?
  28. 28.What amount will ₹8000 grow to in 3 years at 10% per year compound interest (in ₹)?
  29. 29.What is the difference between the compound interest and the simple interest on ₹16400 at 5% per year for 2 years (in ₹)?
  30. 30.What is the difference between the compound interest and the simple interest on ₹35000 at 8% per year for 2 years (in ₹)?
  31. 31.What is the difference between the compound interest and the simple interest on ₹58000 at 5% per year for 2 years (in ₹)?
  32. 32.What amount will ₹37200 grow to in 1 year at 5% per year compound interest (in ₹)?
  33. 33.A town has 12400 people. The population grows by 8% every year. What will the population be after 1 year?
  34. 34.What is the difference between the compound interest and the simple interest on ₹12000 at 5% per year for 2 years (in ₹)?
  35. 35.What amount will ₹8000 grow to in 3 years at 15% per year compound interest (in ₹)?
  36. 36.Find the compound interest on ₹10400 at 25% per year for 1 year, compounded every year (in ₹).
  37. 37.Find the compound interest on ₹28400 at 10% per year for 2 years, compounded every year (in ₹).
  38. 38.What is the difference between the compound interest and the simple interest on ₹43200 at 5% per year for 2 years (in ₹)?
  39. 39.What amount will ₹32000 grow to in 3 years at 15% per year compound interest (in ₹)?
  40. 40.Find the compound interest on ₹43700 at 20% per year for 1 year, compounded every year (in ₹).

Answer key

  1. 1408
  2. 1152
  3. 43904
  4. 92500
  5. 41688
  6. 272
  7. 5625
  8. 40768
  9. 11448
  10. 35280
  11. 112
  12. 17864
  13. 64827
  14. 53312
  15. 46305
  16. 450
  17. 1325
  18. 29505
  19. 12544
  20. 5044
  21. 60795
  22. 504
  23. 569
  24. 1272
  25. 76
  26. 6305
  27. 34606
  28. 10648
  29. 41
  30. 224
  31. 145
  32. 39060
  33. 13392
  34. 30
  35. 12167
  36. 2600
  37. 5964
  38. 108
  39. 48668
  40. 8740

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