Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 870 · 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 39500 people. The population grows by 20% every year. What will the population be after 2 years?
2. 2.What amount will ₹1600 grow to in 3 years at 25% per year compound interest (in ₹)?
3. 3.What amount will ₹50800 grow to in 1 year at 5% per year compound interest (in ₹)?
4. 4.Find the compound interest on ₹37400 at 8% per year for 1 year, compounded every year (in ₹).
5. 5.What amount will ₹39700 grow to in 2 years at 10% per year compound interest (in ₹)?
6. 6.What is the difference between the compound interest and the simple interest on ₹42500 at 10% per year for 2 years (in ₹)?
7. 7.What amount will ₹56000 grow to in 3 years at 5% per year compound interest (in ₹)?
8. 8.What amount will ₹3700 grow to in 1 year at 4% per year compound interest (in ₹)?
9. 9.What amount will ₹16000 grow to in 3 years at 5% per year compound interest (in ₹)?
10. 10.A scooter is worth ₹16000. Its value falls by 5% every year. What will it be worth after 3 years (in ₹)?
11. 11.A scooter is worth ₹29000. Its value falls by 10% every year. What will it be worth after 3 years (in ₹)?
12. 12.A scooter is worth ₹4300. Its value falls by 20% every year. What will it be worth after 1 year (in ₹)?
13. 13.What is the difference between the compound interest and the simple interest on ₹8400 at 25% per year for 2 years (in ₹)?
14. 14.What amount will ₹33500 grow to in 1 year at 10% per year compound interest (in ₹)?
15. 15.What is the difference between the compound interest and the simple interest on ₹47500 at 8% per year for 2 years (in ₹)?
16. 16.Find the compound interest on ₹42200 at 20% per year for 2 years, compounded every year (in ₹).
17. 17.A town has 17200 people. The population grows by 10% every year. What will the population be after 2 years?
18. 18.What is the difference between the compound interest and the simple interest on ₹13200 at 5% per year for 2 years (in ₹)?
19. 19.What amount will ₹32500 grow to in 2 years at 12% per year compound interest (in ₹)?
20. 20.What amount will ₹17500 grow to in 3 years at 20% per year compound interest (in ₹)?
21. 21.What is the difference between the compound interest and the simple interest on ₹48300 at 20% per year for 2 years (in ₹)?
22. 22.Find the compound interest on ₹34200 at 5% per year for 1 year, compounded every year (in ₹).
23. 23.Find the compound interest on ₹18000 at 20% per year for 3 years, compounded every year (in ₹).
24. 24.What is the difference between the compound interest and the simple interest on ₹32800 at 15% per year for 2 years (in ₹)?
25. 25.Find the compound interest on ₹48000 at 5% per year for 3 years, compounded every year (in ₹).
26. 26.A scooter is worth ₹2500. Its value falls by 12% every year. What will it be worth after 2 years (in ₹)?
27. 27.What is the difference between the compound interest and the simple interest on ₹28000 at 15% per year for 2 years (in ₹)?
28. 28.A town has 48000 people. The population grows by 15% every year. What will the population be after 3 years?
29. 29.A scooter is worth ₹40800. Its value falls by 5% every year. What will it be worth after 2 years (in ₹)?
30. 30.A town has 17600 people. The population grows by 10% every year. What will the population be after 1 year?
31. 31.Find the compound interest on ₹16000 at 5% per year for 3 years, compounded every year (in ₹).
32. 32.Find the compound interest on ₹56000 at 15% per year for 3 years, compounded every year (in ₹).
33. 33.Find the compound interest on ₹47200 at 20% per year for 2 years, compounded every year (in ₹).
34. 34.A scooter is worth ₹21400. Its value falls by 5% every year. What will it be worth after 1 year (in ₹)?
35. 35.Find the compound interest on ₹3900 at 10% per year for 2 years, compounded every year (in ₹).
36. 36.A scooter is worth ₹54400. Its value falls by 25% every year. What will it be worth after 3 years (in ₹)?
37. 37.What is the difference between the compound interest and the simple interest on ₹46800 at 10% per year for 2 years (in ₹)?
38. 38.A scooter is worth ₹55000. Its value falls by 12% every year. What will it be worth after 2 years (in ₹)?
39. 39.What is the difference between the compound interest and the simple interest on ₹12500 at 12% per year for 2 years (in ₹)?
40. 40.What is the difference between the compound interest and the simple interest on ₹4800 at 5% per year for 2 years (in ₹)?

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