Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 429 · 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 2500 people. The population grows by 20% every year. What will the population be after 3 years?
2. 2.What amount will ₹45200 grow to in 2 years at 5% per year compound interest (in ₹)?
3. 3.What amount will ₹36100 grow to in 1 year at 12% per year compound interest (in ₹)?
4. 4.Find the compound interest on ₹18000 at 10% per year for 3 years, compounded every year (in ₹).
5. 5.A scooter is worth ₹43600. Its value falls by 15% every year. What will it be worth after 2 years (in ₹)?
6. 6.What is the difference between the compound interest and the simple interest on ₹21700 at 10% per year for 2 years (in ₹)?
7. 7.What is the difference between the compound interest and the simple interest on ₹38400 at 10% per year for 2 years (in ₹)?
8. 8.A town has 37900 people. The population grows by 10% every year. What will the population be after 1 year?
9. 9.What amount will ₹28400 grow to in 1 year at 10% per year compound interest (in ₹)?
10. 10.What is the difference between the compound interest and the simple interest on ₹31400 at 20% per year for 2 years (in ₹)?
11. 11.What is the difference between the compound interest and the simple interest on ₹14800 at 15% per year for 2 years (in ₹)?
12. 12.What is the difference between the compound interest and the simple interest on ₹52500 at 12% per year for 2 years (in ₹)?
13. 13.A scooter is worth ₹17500. Its value falls by 20% every year. What will it be worth after 3 years (in ₹)?
14. 14.A scooter is worth ₹19400. Its value falls by 12% every year. What will it be worth after 1 year (in ₹)?
15. 15.What amount will ₹52800 grow to in 3 years at 25% per year compound interest (in ₹)?
16. 16.A scooter is worth ₹14800. Its value falls by 15% every year. What will it be worth after 2 years (in ₹)?
17. 17.What amount will ₹14700 grow to in 1 year at 20% per year compound interest (in ₹)?
18. 18.What amount will ₹31000 grow to in 3 years at 10% per year compound interest (in ₹)?
19. 19.What amount will ₹21800 grow to in 2 years at 20% per year compound interest (in ₹)?
20. 20.What is the difference between the compound interest and the simple interest on ₹36400 at 20% per year for 2 years (in ₹)?
21. 21.A scooter is worth ₹47500. Its value falls by 12% every year. What will it be worth after 2 years (in ₹)?
22. 22.Find the compound interest on ₹22500 at 8% per year for 2 years, compounded every year (in ₹).
23. 23.What is the difference between the compound interest and the simple interest on ₹42800 at 25% per year for 2 years (in ₹)?
24. 24.What amount will ₹25000 grow to in 2 years at 8% per year compound interest (in ₹)?
25. 25.A town has 26800 people. The population grows by 5% every year. What will the population be after 2 years?
26. 26.A scooter is worth ₹36800. Its value falls by 25% every year. What will it be worth after 3 years (in ₹)?
27. 27.Find the compound interest on ₹38000 at 10% per year for 3 years, compounded every year (in ₹).
28. 28.What is the difference between the compound interest and the simple interest on ₹11900 at 10% per year for 2 years (in ₹)?
29. 29.What amount will ₹59000 grow to in 1 year at 8% per year compound interest (in ₹)?
30. 30.What amount will ₹60000 grow to in 2 years at 12% per year compound interest (in ₹)?
31. 31.What amount will ₹32000 grow to in 3 years at 15% per year compound interest (in ₹)?
32. 32.Find the compound interest on ₹35600 at 15% per year for 2 years, compounded every year (in ₹).
33. 33.What is the difference between the compound interest and the simple interest on ₹45200 at 20% per year for 2 years (in ₹)?
34. 34.What amount will ₹6700 grow to in 1 year at 25% per year compound interest (in ₹)?
35. 35.What amount will ₹31700 grow to in 2 years at 20% per year compound interest (in ₹)?
36. 36.What amount will ₹8000 grow to in 3 years at 5% per year compound interest (in ₹)?
37. 37.Find the compound interest on ₹55000 at 12% per year for 2 years, compounded every year (in ₹).
38. 38.What amount will ₹56000 grow to in 3 years at 5% per year compound interest (in ₹)?
39. 39.What amount will ₹41400 grow to in 1 year at 4% per year compound interest (in ₹)?
40. 40.Find the compound interest on ₹37200 at 25% per year for 2 years, compounded every year (in ₹).

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