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Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 468 · 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 ₹18900 grow to in 1 year at 5% per year compound interest (in ₹)?
  2. 2.Find the compound interest on ₹52500 at 12% per year for 2 years, compounded every year (in ₹).
  3. 3.Find the compound interest on ₹32800 at 5% per year for 2 years, compounded every year (in ₹).
  4. 4.Find the compound interest on ₹10800 at 5% per year for 2 years, compounded every year (in ₹).
  5. 5.Find the compound interest on ₹32800 at 20% per year for 1 year, compounded every year (in ₹).
  6. 6.A scooter is worth ₹37400. Its value falls by 10% every year. What will it be worth after 1 year (in ₹)?
  7. 7.What is the difference between the compound interest and the simple interest on ₹57500 at 8% per year for 2 years (in ₹)?
  8. 8.A town has 6100 people. The population grows by 15% every year. What will the population be after 1 year?
  9. 9.A town has 5300 people. The population grows by 25% every year. What will the population be after 1 year?
  10. 10.A scooter is worth ₹37500. Its value falls by 8% every year. What will it be worth after 2 years (in ₹)?
  11. 11.Find the compound interest on ₹27200 at 25% per year for 3 years, compounded every year (in ₹).
  12. 12.What is the difference between the compound interest and the simple interest on ₹45000 at 8% per year for 2 years (in ₹)?
  13. 13.What amount will ₹54800 grow to in 2 years at 20% per year compound interest (in ₹)?
  14. 14.Find the compound interest on ₹25800 at 20% per year for 2 years, compounded every year (in ₹).
  15. 15.A scooter is worth ₹40000. Its value falls by 5% every year. What will it be worth after 3 years (in ₹)?
  16. 16.What amount will ₹35000 grow to in 2 years at 8% per year compound interest (in ₹)?
  17. 17.What is the difference between the compound interest and the simple interest on ₹56400 at 5% per year for 2 years (in ₹)?
  18. 18.A town has 53200 people. The population grows by 5% every year. What will the population be after 2 years?
  19. 19.What is the difference between the compound interest and the simple interest on ₹37500 at 8% per year for 2 years (in ₹)?
  20. 20.What amount will ₹48000 grow to in 2 years at 20% per year compound interest (in ₹)?
  21. 21.Find the compound interest on ₹41900 at 20% per year for 1 year, compounded every year (in ₹).
  22. 22.A scooter is worth ₹47200. Its value falls by 25% every year. What will it be worth after 1 year (in ₹)?
  23. 23.Find the compound interest on ₹8000 at 10% per year for 2 years, compounded every year (in ₹).
  24. 24.What amount will ₹40000 grow to in 3 years at 5% per year compound interest (in ₹)?
  25. 25.A scooter is worth ₹54000. Its value falls by 12% every year. What will it be worth after 1 year (in ₹)?
  26. 26.What is the difference between the compound interest and the simple interest on ₹16000 at 15% per year for 2 years (in ₹)?
  27. 27.What is the difference between the compound interest and the simple interest on ₹36800 at 25% per year for 2 years (in ₹)?
  28. 28.A scooter is worth ₹6000. Its value falls by 10% every year. What will it be worth after 3 years (in ₹)?
  29. 29.Find the compound interest on ₹38000 at 25% per year for 1 year, compounded every year (in ₹).
  30. 30.A scooter is worth ₹57200. Its value falls by 5% every year. What will it be worth after 2 years (in ₹)?
  31. 31.What amount will ₹58800 grow to in 1 year at 4% per year compound interest (in ₹)?
  32. 32.Find the compound interest on ₹26400 at 10% per year for 1 year, compounded every year (in ₹).
  33. 33.A town has 8000 people. The population grows by 5% every year. What will the population be after 3 years?
  34. 34.What amount will ₹17700 grow to in 1 year at 25% per year compound interest (in ₹)?
  35. 35.Find the compound interest on ₹36400 at 25% per year for 1 year, compounded every year (in ₹).
  36. 36.What amount will ₹6400 grow to in 3 years at 25% per year compound interest (in ₹)?
  37. 37.A town has 7000 people. The population grows by 15% every year. What will the population be after 1 year?
  38. 38.What is the difference between the compound interest and the simple interest on ₹9200 at 10% per year for 2 years (in ₹)?
  39. 39.What is the difference between the compound interest and the simple interest on ₹4700 at 10% per year for 2 years (in ₹)?
  40. 40.A town has 24800 people. The population grows by 20% every year. What will the population be after 1 year?

Answer key

  1. 19845
  2. 13356
  3. 3362
  4. 1107
  5. 6560
  6. 33660
  7. 368
  8. 7015
  9. 6625
  10. 31740
  11. 25925
  12. 288
  13. 78912
  14. 11352
  15. 34295
  16. 40824
  17. 141
  18. 58653
  19. 240
  20. 69120
  21. 8380
  22. 35400
  23. 1680
  24. 46305
  25. 47520
  26. 360
  27. 2300
  28. 4374
  29. 9500
  30. 51623
  31. 61152
  32. 2640
  33. 9261
  34. 22125
  35. 9100
  36. 12500
  37. 8050
  38. 92
  39. 47
  40. 29760

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