Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 11 · 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 ₹32700 grow to in 1 year at 12% per year compound interest (in ₹)?
2. 2.A town has 16000 people. The population grows by 25% every year. What will the population be after 1 year?
3. 3.A town has 15000 people. The population grows by 4% every year. What will the population be after 2 years?
4. 4.What is the difference between the compound interest and the simple interest on ₹47500 at 12% per year for 2 years (in ₹)?
5. 5.What is the difference between the compound interest and the simple interest on ₹12500 at 4% per year for 2 years (in ₹)?
6. 6.What amount will ₹21200 grow to in 2 years at 15% per year compound interest (in ₹)?
7. 7.A town has 27500 people. The population grows by 4% every year. What will the population be after 2 years?
8. 8.A scooter is worth ₹17600. Its value falls by 12% every year. What will it be worth after 1 year (in ₹)?
9. 9.A town has 44800 people. The population grows by 25% every year. What will the population be after 3 years?
10. 10.What is the difference between the compound interest and the simple interest on ₹30800 at 15% per year for 2 years (in ₹)?
11. 11.A scooter is worth ₹53200. Its value falls by 5% every year. What will it be worth after 1 year (in ₹)?
12. 12.What amount will ₹37600 grow to in 2 years at 5% per year compound interest (in ₹)?
13. 13.What amount will ₹3600 grow to in 1 year at 20% per year compound interest (in ₹)?
14. 14.Find the compound interest on ₹45200 at 5% per year for 2 years, compounded every year (in ₹).
15. 15.What is the difference between the compound interest and the simple interest on ₹36800 at 20% per year for 2 years (in ₹)?
16. 16.Find the compound interest on ₹22700 at 5% per year for 1 year, compounded every year (in ₹).
17. 17.What amount will ₹43000 grow to in 1 year at 25% per year compound interest (in ₹)?
18. 18.A scooter is worth ₹47500. Its value falls by 4% every year. What will it be worth after 2 years (in ₹)?
19. 19.What amount will ₹55200 grow to in 1 year at 8% per year compound interest (in ₹)?
20. 20.What amount will ₹10000 grow to in 2 years at 10% per year compound interest (in ₹)?
21. 21.A town has 46500 people. The population grows by 20% every year. What will the population be after 3 years?
22. 22.A town has 32500 people. The population grows by 4% every year. What will the population be after 2 years?
23. 23.Find the compound interest on ₹3000 at 20% per year for 1 year, compounded every year (in ₹).
24. 24.Find the compound interest on ₹46400 at 4% per year for 1 year, compounded every year (in ₹).
25. 25.What is the difference between the compound interest and the simple interest on ₹32500 at 4% per year for 2 years (in ₹)?
26. 26.A town has 37100 people. The population grows by 20% every year. What will the population be after 1 year?
27. 27.Find the compound interest on ₹58400 at 20% per year for 2 years, compounded every year (in ₹).
28. 28.Find the compound interest on ₹52100 at 12% per year for 1 year, compounded every year (in ₹).
29. 29.What amount will ₹55200 grow to in 1 year at 5% per year compound interest (in ₹)?
30. 30.A scooter is worth ₹42900. Its value falls by 20% every year. What will it be worth after 1 year (in ₹)?
31. 31.A town has 13600 people. The population grows by 12% 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 8% per year for 2 years (in ₹)?
33. 33.What is the difference between the compound interest and the simple interest on ₹15000 at 4% per year for 2 years (in ₹)?
34. 34.What is the difference between the compound interest and the simple interest on ₹37500 at 4% per year for 2 years (in ₹)?
35. 35.What amount will ₹31600 grow to in 2 years at 5% per year compound interest (in ₹)?
36. 36.What amount will ₹60000 grow to in 2 years at 4% per year compound interest (in ₹)?
37. 37.What is the difference between the compound interest and the simple interest on ₹6500 at 20% per year for 2 years (in ₹)?
38. 38.What is the difference between the compound interest and the simple interest on ₹30800 at 25% per year for 2 years (in ₹)?
39. 39.Find the compound interest on ₹30000 at 12% per year for 2 years, compounded every year (in ₹).
40. 40.What is the difference between the compound interest and the simple interest on ₹21000 at 20% per year for 2 years (in ₹)?

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