Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 302 · 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.What amount will ₹30000 grow to in 2 years at 4% per year compound interest (in ₹)?
2. 2.Find the compound interest on ₹14600 at 20% per year for 1 year, compounded every year (in ₹).
3. 3.What is the difference between the compound interest and the simple interest on ₹34800 at 5% per year for 2 years (in ₹)?
4. 4.A scooter is worth ₹49600. Its value falls by 25% every year. What will it be worth after 3 years (in ₹)?
5. 5.What is the difference between the compound interest and the simple interest on ₹19200 at 20% per year for 2 years (in ₹)?
6. 6.A scooter is worth ₹7500. Its value falls by 20% every year. What will it be worth after 3 years (in ₹)?
7. 7.What amount will ₹16000 grow to in 3 years at 15% per year compound interest (in ₹)?
8. 8.What is the difference between the compound interest and the simple interest on ₹40000 at 25% per year for 2 years (in ₹)?
9. 9.What is the difference between the compound interest and the simple interest on ₹8800 at 15% per year for 2 years (in ₹)?
10. 10.What is the difference between the compound interest and the simple interest on ₹47300 at 20% per year for 2 years (in ₹)?
11. 11.What is the difference between the compound interest and the simple interest on ₹57500 at 12% per year for 2 years (in ₹)?
12. 12.A scooter is worth ₹52800. Its value falls by 25% every year. What will it be worth after 3 years (in ₹)?
13. 13.A scooter is worth ₹11800. Its value falls by 20% every year. What will it be worth after 1 year (in ₹)?
14. 14.Find the compound interest on ₹29500 at 20% per year for 3 years, compounded every year (in ₹).
15. 15.A scooter is worth ₹14300. Its value falls by 10% every year. What will it be worth after 2 years (in ₹)?
16. 16.What amount will ₹43100 grow to in 1 year at 15% per year compound interest (in ₹)?
17. 17.A town has 31400 people. The population grows by 10% every year. What will the population be after 2 years?
18. 18.What amount will ₹40000 grow to in 3 years at 15% per year compound interest (in ₹)?
19. 19.Find the compound interest on ₹45000 at 8% per year for 2 years, compounded every year (in ₹).
20. 20.Find the compound interest on ₹7600 at 25% per year for 2 years, compounded every year (in ₹).
21. 21.What amount will ₹14300 grow to in 1 year at 15% per year compound interest (in ₹)?
22. 22.What is the difference between the compound interest and the simple interest on ₹25600 at 5% per year for 2 years (in ₹)?
23. 23.A town has 16000 people. The population grows by 15% every year. What will the population be after 3 years?
24. 24.Find the compound interest on ₹27500 at 8% per year for 2 years, compounded every year (in ₹).
25. 25.Find the compound interest on ₹8000 at 5% per year for 3 years, compounded every year (in ₹).
26. 26.What amount will ₹2500 grow to in 1 year at 20% per year compound interest (in ₹)?
27. 27.Find the compound interest on ₹21900 at 20% per year for 2 years, compounded every year (in ₹).
28. 28.What amount will ₹50000 grow to in 3 years at 10% per year compound interest (in ₹)?
29. 29.A town has 38400 people. The population grows by 4% every year. What will the population be after 1 year?
30. 30.Find the compound interest on ₹45700 at 20% per year for 2 years, compounded every year (in ₹).
31. 31.Find the compound interest on ₹25000 at 20% per year for 3 years, compounded every year (in ₹).
32. 32.Find the compound interest on ₹12300 at 4% per year for 1 year, compounded every year (in ₹).
33. 33.Find the compound interest on ₹20500 at 20% per year for 3 years, compounded every year (in ₹).
34. 34.What amount will ₹24000 grow to in 3 years at 15% per year compound interest (in ₹)?
35. 35.What amount will ₹57800 grow to in 1 year at 25% per year compound interest (in ₹)?
36. 36.What amount will ₹32000 grow to in 3 years at 25% per year compound interest (in ₹)?
37. 37.Find the compound interest on ₹40000 at 5% per year for 3 years, compounded every year (in ₹).
38. 38.What is the difference between the compound interest and the simple interest on ₹12500 at 8% per year for 2 years (in ₹)?
39. 39.What is the difference between the compound interest and the simple interest on ₹59800 at 10% per year for 2 years (in ₹)?
40. 40.A scooter is worth ₹32000. Its value falls by 15% every year. What will it be worth after 3 years (in ₹)?

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