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Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 360 · 40 sums
TalentJR

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 ₹18400 grow to in 1 year at 25% per year compound interest (in ₹)?
  2. 2.Find the compound interest on ₹17500 at 4% per year for 2 years, compounded every year (in ₹).
  3. 3.Find the compound interest on ₹15600 at 8% per year for 1 year, compounded every year (in ₹).
  4. 4.What amount will ₹54000 grow to in 2 years at 15% per year compound interest (in ₹)?
  5. 5.What amount will ₹32000 grow to in 3 years at 5% per year compound interest (in ₹)?
  6. 6.Find the compound interest on ₹16100 at 4% per year for 1 year, compounded every year (in ₹).
  7. 7.What is the difference between the compound interest and the simple interest on ₹2400 at 15% per year for 2 years (in ₹)?
  8. 8.A scooter is worth ₹19600. Its value falls by 25% every year. What will it be worth after 2 years (in ₹)?
  9. 9.A town has 6400 people. The population grows by 25% every year. What will the population be after 2 years?
  10. 10.What amount will ₹44800 grow to in 3 years at 25% per year compound interest (in ₹)?
  11. 11.What amount will ₹3300 grow to in 2 years at 20% per year compound interest (in ₹)?
  12. 12.A scooter is worth ₹44700. Its value falls by 8% every year. What will it be worth after 1 year (in ₹)?
  13. 13.What amount will ₹12500 grow to in 2 years at 8% per year compound interest (in ₹)?
  14. 14.Find the compound interest on ₹51300 at 5% per year for 1 year, compounded every year (in ₹).
  15. 15.A scooter is worth ₹8400. Its value falls by 15% every year. What will it be worth after 2 years (in ₹)?
  16. 16.What amount will ₹5500 grow to in 1 year at 5% per year compound interest (in ₹)?
  17. 17.A town has 47100 people. The population grows by 5% every year. What will the population be after 1 year?
  18. 18.What amount will ₹14800 grow to in 2 years at 5% per year compound interest (in ₹)?
  19. 19.A scooter is worth ₹57600. Its value falls by 5% every year. What will it be worth after 2 years (in ₹)?
  20. 20.A town has 36800 people. The population grows by 5% every year. What will the population be after 2 years?
  21. 21.What is the difference between the compound interest and the simple interest on ₹25600 at 10% per year for 2 years (in ₹)?
  22. 22.What is the difference between the compound interest and the simple interest on ₹52300 at 10% per year for 2 years (in ₹)?
  23. 23.What amount will ₹49600 grow to in 3 years at 25% per year compound interest (in ₹)?
  24. 24.A town has 17600 people. The population grows by 5% every year. What will the population be after 2 years?
  25. 25.Find the compound interest on ₹31700 at 10% per year for 2 years, compounded every year (in ₹).
  26. 26.A town has 24000 people. The population grows by 20% every year. What will the population be after 1 year?
  27. 27.What amount will ₹37300 grow to in 1 year at 5% per year compound interest (in ₹)?
  28. 28.A scooter is worth ₹57500. Its value falls by 4% every year. What will it be worth after 2 years (in ₹)?
  29. 29.A scooter is worth ₹22000. Its value falls by 5% every year. What will it be worth after 2 years (in ₹)?
  30. 30.What amount will ₹34100 grow to in 1 year at 8% per year compound interest (in ₹)?
  31. 31.Find the compound interest on ₹56000 at 5% per year for 3 years, compounded every year (in ₹).
  32. 32.What is the difference between the compound interest and the simple interest on ₹47500 at 12% per year for 2 years (in ₹)?
  33. 33.A town has 8000 people. The population grows by 10% every year. What will the population be after 3 years?
  34. 34.Find the compound interest on ₹17500 at 20% per year for 1 year, compounded every year (in ₹).
  35. 35.Find the compound interest on ₹55000 at 4% per year for 2 years, compounded every year (in ₹).
  36. 36.What is the difference between the compound interest and the simple interest on ₹13600 at 15% per year for 2 years (in ₹)?
  37. 37.What amount will ₹26900 grow to in 1 year at 5% per year compound interest (in ₹)?
  38. 38.What is the difference between the compound interest and the simple interest on ₹28800 at 15% per year for 2 years (in ₹)?
  39. 39.Find the compound interest on ₹58600 at 4% per year for 1 year, compounded every year (in ₹).
  40. 40.What amount will ₹45600 grow to in 2 years at 20% per year compound interest (in ₹)?

Answer key

  1. 23000
  2. 1428
  3. 1248
  4. 71415
  5. 37044
  6. 644
  7. 54
  8. 11025
  9. 10000
  10. 87500
  11. 4752
  12. 41124
  13. 14580
  14. 2565
  15. 6069
  16. 5775
  17. 49455
  18. 16317
  19. 51984
  20. 40572
  21. 256
  22. 523
  23. 96875
  24. 19404
  25. 6657
  26. 28800
  27. 39165
  28. 52992
  29. 19855
  30. 36828
  31. 8827
  32. 684
  33. 10648
  34. 3500
  35. 4488
  36. 306
  37. 28245
  38. 648
  39. 2344
  40. 65664

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