Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 220 · 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 scooter is worth ₹36800. Its value falls by 25% every year. What will it be worth after 3 years (in ₹)?
2. 2.A town has 33200 people. The population grows by 5% every year. What will the population be after 2 years?
3. 3.Find the compound interest on ₹31500 at 10% per year for 1 year, compounded every year (in ₹).
4. 4.What amount will ₹16000 grow to in 1 year at 25% per year compound interest (in ₹)?
5. 5.Find the compound interest on ₹52800 at 25% per year for 2 years, compounded every year (in ₹).
6. 6.Find the compound interest on ₹10300 at 10% per year for 2 years, compounded every year (in ₹).
7. 7.What amount will ₹7900 grow to in 1 year at 20% per year compound interest (in ₹)?
8. 8.What amount will ₹40000 grow to in 3 years at 15% per year compound interest (in ₹)?
9. 9.What amount will ₹33300 grow to in 1 year at 5% per year compound interest (in ₹)?
10. 10.Find the compound interest on ₹42000 at 10% per year for 3 years, compounded every year (in ₹).
11. 11.Find the compound interest on ₹6800 at 5% per year for 2 years, compounded every year (in ₹).
12. 12.A town has 40000 people. The population grows by 8% every year. What will the population be after 2 years?
13. 13.A scooter is worth ₹25000. Its value falls by 4% every year. What will it be worth after 2 years (in ₹)?
14. 14.What is the difference between the compound interest and the simple interest on ₹42000 at 10% per year for 2 years (in ₹)?
15. 15.Find the compound interest on ₹16300 at 20% per year for 2 years, compounded every year (in ₹).
16. 16.What amount will ₹37000 grow to in 3 years at 20% per year compound interest (in ₹)?
17. 17.Find the compound interest on ₹39800 at 15% per year for 1 year, compounded every year (in ₹).
18. 18.What is the difference between the compound interest and the simple interest on ₹16400 at 5% per year for 2 years (in ₹)?
19. 19.What amount will ₹48000 grow to in 3 years at 15% per year compound interest (in ₹)?
20. 20.What amount will ₹28400 grow to in 2 years at 5% per year compound interest (in ₹)?
21. 21.A scooter is worth ₹3800. Its value falls by 8% every year. What will it be worth after 1 year (in ₹)?
22. 22.Find the compound interest on ₹53000 at 10% per year for 3 years, compounded every year (in ₹).
23. 23.What is the difference between the compound interest and the simple interest on ₹36400 at 25% per year for 2 years (in ₹)?
24. 24.A town has 10000 people. The population grows by 25% every year. What will the population be after 1 year?
25. 25.What amount will ₹38400 grow to in 3 years at 25% per year compound interest (in ₹)?
26. 26.What amount will ₹44700 grow to in 1 year at 25% per year compound interest (in ₹)?
27. 27.Find the compound interest on ₹47500 at 4% per year for 2 years, compounded every year (in ₹).
28. 28.Find the compound interest on ₹10000 at 4% per year for 2 years, compounded every year (in ₹).
29. 29.Find the compound interest on ₹48000 at 15% per year for 3 years, compounded every year (in ₹).
30. 30.A scooter is worth ₹25200. Its value falls by 25% every year. What will it be worth after 2 years (in ₹)?
31. 31.What amount will ₹56000 grow to in 3 years at 5% per year compound interest (in ₹)?
32. 32.A town has 16000 people. The population grows by 5% every year. What will the population be after 3 years?
33. 33.What amount will ₹36100 grow to in 2 years at 20% per year compound interest (in ₹)?
34. 34.What is the difference between the compound interest and the simple interest on ₹35200 at 20% per year for 2 years (in ₹)?
35. 35.What is the difference between the compound interest and the simple interest on ₹36000 at 25% per year for 2 years (in ₹)?
36. 36.What is the difference between the compound interest and the simple interest on ₹32500 at 12% per year for 2 years (in ₹)?
37. 37.What amount will ₹51500 grow to in 3 years at 20% per year compound interest (in ₹)?
38. 38.What amount will ₹57700 grow to in 2 years at 10% per year compound interest (in ₹)?
39. 39.A scooter is worth ₹24000. Its value falls by 10% every year. What will it be worth after 3 years (in ₹)?
40. 40.What is the difference between the compound interest and the simple interest on ₹19200 at 5% per year for 2 years (in ₹)?

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