Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 639 · 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 38400 people. The population grows by 25% every year. What will the population be after 3 years?
2. 2.What amount will ₹39300 grow to in 1 year at 25% per year compound interest (in ₹)?
3. 3.A scooter is worth ₹5100. Its value falls by 20% every year. What will it be worth after 2 years (in ₹)?
4. 4.What amount will ₹37000 grow to in 3 years at 10% per year compound interest (in ₹)?
5. 5.What amount will ₹26700 grow to in 1 year at 5% per year compound interest (in ₹)?
6. 6.Find the compound interest on ₹14600 at 4% per year for 1 year, compounded every year (in ₹).
7. 7.Find the compound interest on ₹30000 at 4% per year for 2 years, compounded every year (in ₹).
8. 8.What amount will ₹12900 grow to in 1 year at 25% per year compound interest (in ₹)?
9. 9.What is the difference between the compound interest and the simple interest on ₹58800 at 10% per year for 2 years (in ₹)?
10. 10.What amount will ₹3000 grow to in 3 years at 10% per year compound interest (in ₹)?
11. 11.A scooter is worth ₹44500. Its value falls by 20% every year. What will it be worth after 3 years (in ₹)?
12. 12.A town has 10000 people. The population grows by 12% every year. What will the population be after 2 years?
13. 13.A town has 5000 people. The population grows by 12% every year. What will the population be after 2 years?
14. 14.A scooter is worth ₹22500. Its value falls by 12% every year. What will it be worth after 2 years (in ₹)?
15. 15.Find the compound interest on ₹17700 at 12% per year for 1 year, compounded every year (in ₹).
16. 16.What amount will ₹47600 grow to in 1 year at 5% per year compound interest (in ₹)?
17. 17.What amount will ₹36600 grow to in 1 year at 15% per year compound interest (in ₹)?
18. 18.What is the difference between the compound interest and the simple interest on ₹47300 at 20% per year for 2 years (in ₹)?
19. 19.What is the difference between the compound interest and the simple interest on ₹38500 at 20% per year for 2 years (in ₹)?
20. 20.A town has 26000 people. The population grows by 15% every year. What will the population be after 2 years?
21. 21.What is the difference between the compound interest and the simple interest on ₹33600 at 25% per year for 2 years (in ₹)?
22. 22.Find the compound interest on ₹3000 at 20% per year for 3 years, compounded every year (in ₹).
23. 23.A town has 13000 people. The population grows by 10% every year. What will the population be after 3 years?
24. 24.What amount will ₹38000 grow to in 2 years at 25% per year compound interest (in ₹)?
25. 25.Find the compound interest on ₹4800 at 25% per year for 3 years, compounded every year (in ₹).
26. 26.Find the compound interest on ₹24000 at 15% per year for 3 years, compounded every year (in ₹).
27. 27.A town has 32000 people. The population grows by 25% every year. What will the population be after 3 years?
28. 28.What amount will ₹53300 grow to in 1 year at 20% per year compound interest (in ₹)?
29. 29.Find the compound interest on ₹45000 at 8% per year for 2 years, compounded every year (in ₹).
30. 30.A town has 13900 people. The population grows by 12% every year. What will the population be after 1 year?
31. 31.A town has 4800 people. The population grows by 20% every year. What will the population be after 2 years?
32. 32.Find the compound interest on ₹17600 at 15% per year for 2 years, compounded every year (in ₹).
33. 33.A scooter is worth ₹52100. Its value falls by 5% every year. What will it be worth after 1 year (in ₹)?
34. 34.A town has 59500 people. The population grows by 20% every year. What will the population be after 3 years?
35. 35.What is the difference between the compound interest and the simple interest on ₹52600 at 20% per year for 2 years (in ₹)?
36. 36.What is the difference between the compound interest and the simple interest on ₹27500 at 8% per year for 2 years (in ₹)?
37. 37.What amount will ₹5700 grow to in 1 year at 15% per year compound interest (in ₹)?
38. 38.What amount will ₹8000 grow to in 3 years at 5% per year compound interest (in ₹)?
39. 39.What is the difference between the compound interest and the simple interest on ₹27500 at 12% per year for 2 years (in ₹)?
40. 40.What is the difference between the compound interest and the simple interest on ₹56400 at 15% per year for 2 years (in ₹)?

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