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Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 846 · 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 ₹51200 at 25% per year for 3 years, compounded every year (in ₹).
  2. 2.A scooter is worth ₹12000. Its value falls by 5% every year. What will it be worth after 2 years (in ₹)?
  3. 3.What is the difference between the compound interest and the simple interest on ₹17200 at 15% per year for 2 years (in ₹)?
  4. 4.Find the compound interest on ₹19500 at 20% per year for 3 years, compounded every year (in ₹).
  5. 5.What amount will ₹47500 grow to in 2 years at 12% per year compound interest (in ₹)?
  6. 6.Find the compound interest on ₹22500 at 4% per year for 2 years, compounded every year (in ₹).
  7. 7.What is the difference between the compound interest and the simple interest on ₹2000 at 20% per year for 2 years (in ₹)?
  8. 8.Find the compound interest on ₹35000 at 10% per year for 3 years, compounded every year (in ₹).
  9. 9.A town has 8000 people. The population grows by 15% every year. What will the population be after 3 years?
  10. 10.Find the compound interest on ₹21600 at 25% per year for 2 years, compounded every year (in ₹).
  11. 11.Find the compound interest on ₹48400 at 25% per year for 2 years, compounded every year (in ₹).
  12. 12.What amount will ₹40800 grow to in 2 years at 15% per year compound interest (in ₹)?
  13. 13.What amount will ₹7200 grow to in 1 year at 10% per year compound interest (in ₹)?
  14. 14.Find the compound interest on ₹15000 at 8% per year for 2 years, compounded every year (in ₹).
  15. 15.A scooter is worth ₹2300. Its value falls by 5% every year. What will it be worth after 1 year (in ₹)?
  16. 16.A town has 38900 people. The population grows by 20% every year. What will the population be after 1 year?
  17. 17.Find the compound interest on ₹47100 at 8% per year for 1 year, compounded every year (in ₹).
  18. 18.What amount will ₹51200 grow to in 1 year at 20% per year compound interest (in ₹)?
  19. 19.What is the difference between the compound interest and the simple interest on ₹17500 at 8% per year for 2 years (in ₹)?
  20. 20.What amount will ₹56800 grow to in 1 year at 4% per year compound interest (in ₹)?
  21. 21.What amount will ₹56400 grow to in 2 years at 5% per year compound interest (in ₹)?
  22. 22.What is the difference between the compound interest and the simple interest on ₹17600 at 5% per year for 2 years (in ₹)?
  23. 23.Find the compound interest on ₹18000 at 8% per year for 1 year, compounded every year (in ₹).
  24. 24.Find the compound interest on ₹3400 at 8% per year for 1 year, compounded every year (in ₹).
  25. 25.What is the difference between the compound interest and the simple interest on ₹40400 at 25% per year for 2 years (in ₹)?
  26. 26.Find the compound interest on ₹2800 at 25% per year for 2 years, compounded every year (in ₹).
  27. 27.A scooter is worth ₹56300. Its value falls by 4% every year. What will it be worth after 1 year (in ₹)?
  28. 28.What amount will ₹37500 grow to in 2 years at 8% per year compound interest (in ₹)?
  29. 29.What amount will ₹48500 grow to in 1 year at 12% per year compound interest (in ₹)?
  30. 30.Find the compound interest on ₹6400 at 25% per year for 3 years, compounded every year (in ₹).
  31. 31.What amount will ₹9700 grow to in 1 year at 4% per year compound interest (in ₹)?
  32. 32.What amount will ₹14400 grow to in 2 years at 15% per year compound interest (in ₹)?
  33. 33.A scooter is worth ₹11000. Its value falls by 10% every year. What will it be worth after 3 years (in ₹)?
  34. 34.Find the compound interest on ₹34400 at 8% per year for 1 year, compounded every year (in ₹).
  35. 35.Find the compound interest on ₹40000 at 25% per year for 2 years, compounded every year (in ₹).
  36. 36.What amount will ₹9600 grow to in 3 years at 25% per year compound interest (in ₹)?
  37. 37.A scooter is worth ₹56700. Its value falls by 10% every year. What will it be worth after 1 year (in ₹)?
  38. 38.Find the compound interest on ₹11200 at 25% per year for 3 years, compounded every year (in ₹).
  39. 39.Find the compound interest on ₹14400 at 25% per year for 3 years, compounded every year (in ₹).
  40. 40.Find the compound interest on ₹10800 at 15% per year for 2 years, compounded every year (in ₹).

Answer key

  1. 48800
  2. 10830
  3. 387
  4. 14196
  5. 59584
  6. 1836
  7. 80
  8. 11585
  9. 12167
  10. 12150
  11. 27225
  12. 53958
  13. 7920
  14. 2496
  15. 2185
  16. 46680
  17. 3768
  18. 61440
  19. 112
  20. 59072
  21. 62181
  22. 44
  23. 1440
  24. 272
  25. 2525
  26. 1575
  27. 54048
  28. 43740
  29. 54320
  30. 6100
  31. 10088
  32. 19044
  33. 8019
  34. 2752
  35. 22500
  36. 18750
  37. 51030
  38. 10675
  39. 13725
  40. 3483

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