Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 81 · 40 sums

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.

1. 1.A town has 25100 people. The population grows by 25% every year. What will the population be after 1 year?
2. 2.What amount will ₹17500 grow to in 2 years at 4% per year compound interest (in ₹)?
3. 3.Find the compound interest on ₹44500 at 5% per year for 1 year, compounded every year (in ₹).
4. 4.Find the compound interest on ₹4700 at 12% per year for 1 year, compounded every year (in ₹).
5. 5.A town has 18400 people. The population grows by 25% every year. What will the population be after 1 year?
6. 6.A town has 39100 people. The population grows by 12% every year. What will the population be after 1 year?
7. 7.What amount will ₹8000 grow to in 3 years at 5% per year compound interest (in ₹)?
8. 8.Find the compound interest on ₹45000 at 4% per year for 2 years, compounded every year (in ₹).
9. 9.A scooter is worth ₹57500. Its value falls by 20% every year. What will it be worth after 3 years (in ₹)?
10. 10.What amount will ₹53900 grow to in 1 year at 10% per year compound interest (in ₹)?
11. 11.Find the compound interest on ₹44800 at 20% per year for 1 year, compounded every year (in ₹).
12. 12.Find the compound interest on ₹56000 at 15% per year for 3 years, compounded every year (in ₹).
13. 13.A scooter is worth ₹47500. Its value falls by 4% every year. What will it be worth after 2 years (in ₹)?
14. 14.What amount will ₹54400 grow to in 2 years at 20% per year compound interest (in ₹)?
15. 15.What amount will ₹40000 grow to in 2 years at 4% per year compound interest (in ₹)?
16. 16.Find the compound interest on ₹51600 at 5% per year for 2 years, compounded every year (in ₹).
17. 17.What amount will ₹11900 grow to in 1 year at 25% per year compound interest (in ₹)?
18. 18.Find the compound interest on ₹15400 at 10% per year for 2 years, compounded every year (in ₹).
19. 19.A scooter is worth ₹16000. Its value falls by 5% every year. What will it be worth after 3 years (in ₹)?
20. 20.What is the difference between the compound interest and the simple interest on ₹52700 at 20% per year for 2 years (in ₹)?
21. 21.Find the compound interest on ₹16000 at 5% per year for 3 years, compounded every year (in ₹).
22. 22.A scooter is worth ₹54000. Its value falls by 10% every year. What will it be worth after 3 years (in ₹)?
23. 23.Find the compound interest on ₹10000 at 12% per year for 2 years, compounded every year (in ₹).
24. 24.A town has 8100 people. The population grows by 15% every year. What will the population be after 1 year?
25. 25.What amount will ₹54600 grow to in 1 year at 4% per year compound interest (in ₹)?
26. 26.What is the difference between the compound interest and the simple interest on ₹25000 at 20% per year for 2 years (in ₹)?
27. 27.What is the difference between the compound interest and the simple interest on ₹3200 at 20% per year for 2 years (in ₹)?
28. 28.A town has 32400 people. The population grows by 15% every year. What will the population be after 1 year?
29. 29.A scooter is worth ₹24000. Its value falls by 15% every year. What will it be worth after 3 years (in ₹)?
30. 30.What amount will ₹34400 grow to in 2 years at 5% per year compound interest (in ₹)?
31. 31.A town has 33100 people. The population grows by 15% every year. What will the population be after 1 year?
32. 32.What is the difference between the compound interest and the simple interest on ₹12500 at 12% per year for 2 years (in ₹)?
33. 33.Find the compound interest on ₹16000 at 15% per year for 3 years, compounded every year (in ₹).
34. 34.What is the difference between the compound interest and the simple interest on ₹38000 at 15% per year for 2 years (in ₹)?
35. 35.What amount will ₹26200 grow to in 1 year at 8% per year compound interest (in ₹)?
36. 36.What is the difference between the compound interest and the simple interest on ₹52500 at 8% per year for 2 years (in ₹)?
37. 37.Find the compound interest on ₹14600 at 20% per year for 2 years, compounded every year (in ₹).
38. 38.What amount will ₹26300 grow to in 1 year at 8% per year compound interest (in ₹)?
39. 39.Find the compound interest on ₹28000 at 5% per year for 2 years, compounded every year (in ₹).
40. 40.Find the compound interest on ₹6200 at 10% per year for 2 years, compounded every year (in ₹).

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