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Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 849 · 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.Find the compound interest on ₹50300 at 10% per year for 1 year, compounded every year (in ₹).
  2. 2.A scooter is worth ₹48000. Its value falls by 15% every year. What will it be worth after 3 years (in ₹)?
  3. 3.What is the difference between the compound interest and the simple interest on ₹49200 at 15% per year for 2 years (in ₹)?
  4. 4.What is the difference between the compound interest and the simple interest on ₹22500 at 4% per year for 2 years (in ₹)?
  5. 5.Find the compound interest on ₹38000 at 15% per year for 2 years, compounded every year (in ₹).
  6. 6.What is the difference between the compound interest and the simple interest on ₹10000 at 4% per year for 2 years (in ₹)?
  7. 7.What is the difference between the compound interest and the simple interest on ₹12500 at 8% per year for 2 years (in ₹)?
  8. 8.What amount will ₹16800 grow to in 2 years at 15% per year compound interest (in ₹)?
  9. 9.What is the difference between the compound interest and the simple interest on ₹22200 at 10% per year for 2 years (in ₹)?
  10. 10.What is the difference between the compound interest and the simple interest on ₹56800 at 5% per year for 2 years (in ₹)?
  11. 11.What amount will ₹9100 grow to in 1 year at 20% per year compound interest (in ₹)?
  12. 12.Find the compound interest on ₹19900 at 20% per year for 1 year, compounded every year (in ₹).
  13. 13.Find the compound interest on ₹6000 at 25% per year for 2 years, compounded every year (in ₹).
  14. 14.What is the difference between the compound interest and the simple interest on ₹15000 at 8% per year for 2 years (in ₹)?
  15. 15.Find the compound interest on ₹43800 at 12% per year for 1 year, compounded every year (in ₹).
  16. 16.What is the difference between the compound interest and the simple interest on ₹50800 at 15% per year for 2 years (in ₹)?
  17. 17.Find the compound interest on ₹26200 at 25% per year for 1 year, compounded every year (in ₹).
  18. 18.Find the compound interest on ₹43100 at 5% per year for 1 year, compounded every year (in ₹).
  19. 19.A scooter is worth ₹50000. Its value falls by 8% every year. What will it be worth after 2 years (in ₹)?
  20. 20.What is the difference between the compound interest and the simple interest on ₹12500 at 4% per year for 2 years (in ₹)?
  21. 21.What amount will ₹17200 grow to in 2 years at 15% per year compound interest (in ₹)?
  22. 22.Find the compound interest on ₹56000 at 5% per year for 3 years, compounded every year (in ₹).
  23. 23.What amount will ₹35000 grow to in 2 years at 12% per year compound interest (in ₹)?
  24. 24.What amount will ₹11200 grow to in 3 years at 25% per year compound interest (in ₹)?
  25. 25.Find the compound interest on ₹16000 at 5% per year for 2 years, compounded every year (in ₹).
  26. 26.A town has 51600 people. The population grows by 12% every year. What will the population be after 1 year?
  27. 27.Find the compound interest on ₹21700 at 25% per year for 1 year, compounded every year (in ₹).
  28. 28.What amount will ₹21400 grow to in 1 year at 10% per year compound interest (in ₹)?
  29. 29.Find the compound interest on ₹33000 at 10% per year for 3 years, compounded every year (in ₹).
  30. 30.A town has 14800 people. The population grows by 25% every year. What will the population be after 2 years?
  31. 31.What is the difference between the compound interest and the simple interest on ₹28800 at 10% per year for 2 years (in ₹)?
  32. 32.A scooter is worth ₹32500. Its value falls by 4% every year. What will it be worth after 2 years (in ₹)?
  33. 33.Find the compound interest on ₹45100 at 10% per year for 2 years, compounded every year (in ₹).
  34. 34.Find the compound interest on ₹35800 at 15% per year for 1 year, compounded every year (in ₹).
  35. 35.What is the difference between the compound interest and the simple interest on ₹8000 at 25% per year for 2 years (in ₹)?
  36. 36.Find the compound interest on ₹23200 at 5% per year for 2 years, compounded every year (in ₹).
  37. 37.A scooter is worth ₹26500. Its value falls by 20% every year. What will it be worth after 3 years (in ₹)?
  38. 38.A scooter is worth ₹22500. Its value falls by 4% every year. What will it be worth after 2 years (in ₹)?
  39. 39.What amount will ₹23800 grow to in 1 year at 10% per year compound interest (in ₹)?
  40. 40.Find the compound interest on ₹51600 at 5% per year for 2 years, compounded every year (in ₹).

Answer key

  1. 5030
  2. 29478
  3. 1107
  4. 36
  5. 12255
  6. 16
  7. 80
  8. 22218
  9. 222
  10. 142
  11. 10920
  12. 3980
  13. 3375
  14. 96
  15. 5256
  16. 1143
  17. 6550
  18. 2155
  19. 42320
  20. 20
  21. 22747
  22. 8827
  23. 43904
  24. 21875
  25. 1640
  26. 57792
  27. 5425
  28. 23540
  29. 10923
  30. 23125
  31. 288
  32. 29952
  33. 9471
  34. 5370
  35. 500
  36. 2378
  37. 13568
  38. 20736
  39. 26180
  40. 5289

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