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Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 273 · 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.What amount will ₹27500 grow to in 1 year at 25% per year compound interest (in ₹)?
  2. 2.A scooter is worth ₹50200. Its value falls by 12% every year. What will it be worth after 1 year (in ₹)?
  3. 3.Find the compound interest on ₹50000 at 4% per year for 2 years, compounded every year (in ₹).
  4. 4.What amount will ₹9100 grow to in 1 year at 12% per year compound interest (in ₹)?
  5. 5.A scooter is worth ₹12100. Its value falls by 5% every year. What will it be worth after 1 year (in ₹)?
  6. 6.Find the compound interest on ₹12800 at 12% per year for 1 year, compounded every year (in ₹).
  7. 7.What amount will ₹57500 grow to in 2 years at 4% per year compound interest (in ₹)?
  8. 8.Find the compound interest on ₹56000 at 5% per year for 3 years, compounded every year (in ₹).
  9. 9.What is the difference between the compound interest and the simple interest on ₹34000 at 25% per year for 2 years (in ₹)?
  10. 10.Find the compound interest on ₹42700 at 4% per year for 1 year, compounded every year (in ₹).
  11. 11.Find the compound interest on ₹40000 at 15% per year for 3 years, compounded every year (in ₹).
  12. 12.What is the difference between the compound interest and the simple interest on ₹40000 at 8% per year for 2 years (in ₹)?
  13. 13.What amount will ₹37400 grow to in 1 year at 8% per year compound interest (in ₹)?
  14. 14.What is the difference between the compound interest and the simple interest on ₹31600 at 25% per year for 2 years (in ₹)?
  15. 15.Find the compound interest on ₹47500 at 4% per year for 2 years, compounded every year (in ₹).
  16. 16.What amount will ₹35400 grow to in 1 year at 25% per year compound interest (in ₹)?
  17. 17.What is the difference between the compound interest and the simple interest on ₹17300 at 20% per year for 2 years (in ₹)?
  18. 18.What is the difference between the compound interest and the simple interest on ₹20400 at 15% per year for 2 years (in ₹)?
  19. 19.Find the compound interest on ₹32900 at 10% per year for 1 year, compounded every year (in ₹).
  20. 20.A town has 45400 people. The population grows by 25% every year. What will the population be after 1 year?
  21. 21.Find the compound interest on ₹33200 at 5% per year for 2 years, compounded every year (in ₹).
  22. 22.What amount will ₹9900 grow to in 1 year at 5% per year compound interest (in ₹)?
  23. 23.A town has 13100 people. The population grows by 20% every year. What will the population be after 1 year?
  24. 24.What is the difference between the compound interest and the simple interest on ₹11800 at 10% per year for 2 years (in ₹)?
  25. 25.A scooter is worth ₹45500. Its value falls by 12% every year. What will it be worth after 1 year (in ₹)?
  26. 26.Find the compound interest on ₹12200 at 10% per year for 2 years, compounded every year (in ₹).
  27. 27.Find the compound interest on ₹17500 at 12% per year for 2 years, compounded every year (in ₹).
  28. 28.Find the compound interest on ₹52000 at 5% per year for 2 years, compounded every year (in ₹).
  29. 29.Find the compound interest on ₹38800 at 10% per year for 1 year, compounded every year (in ₹).
  30. 30.What amount will ₹12700 grow to in 1 year at 5% per year compound interest (in ₹)?
  31. 31.What amount will ₹39900 grow to in 1 year at 5% per year compound interest (in ₹)?
  32. 32.Find the compound interest on ₹16400 at 10% per year for 2 years, compounded every year (in ₹).
  33. 33.A scooter is worth ₹32800. Its value falls by 25% every year. What will it be worth after 2 years (in ₹)?
  34. 34.Find the compound interest on ₹22000 at 10% per year for 1 year, compounded every year (in ₹).
  35. 35.What is the difference between the compound interest and the simple interest on ₹52500 at 4% per year for 2 years (in ₹)?
  36. 36.What is the difference between the compound interest and the simple interest on ₹24400 at 15% per year for 2 years (in ₹)?
  37. 37.What is the difference between the compound interest and the simple interest on ₹27300 at 20% per year for 2 years (in ₹)?
  38. 38.What amount will ₹26000 grow to in 3 years at 10% per year compound interest (in ₹)?
  39. 39.What is the difference between the compound interest and the simple interest on ₹44800 at 25% per year for 2 years (in ₹)?
  40. 40.What is the difference between the compound interest and the simple interest on ₹22400 at 5% per year for 2 years (in ₹)?

Answer key

  1. 34375
  2. 44176
  3. 4080
  4. 10192
  5. 11495
  6. 1536
  7. 62192
  8. 8827
  9. 2125
  10. 1708
  11. 20835
  12. 256
  13. 40392
  14. 1975
  15. 3876
  16. 44250
  17. 692
  18. 459
  19. 3290
  20. 56750
  21. 3403
  22. 10395
  23. 15720
  24. 118
  25. 40040
  26. 2562
  27. 4452
  28. 5330
  29. 3880
  30. 13335
  31. 41895
  32. 3444
  33. 18450
  34. 2200
  35. 84
  36. 549
  37. 1092
  38. 34606
  39. 2800
  40. 56

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