Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 720 · 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 8000 people. The population grows by 15% every year. What will the population be after 2 years?
2. 2.What amount will ₹29500 grow to in 3 years at 20% per year compound interest (in ₹)?
3. 3.What amount will ₹15800 grow to in 2 years at 20% per year compound interest (in ₹)?
4. 4.What is the difference between the compound interest and the simple interest on ₹34000 at 5% per year for 2 years (in ₹)?
5. 5.What amount will ₹2600 grow to in 1 year at 5% per year compound interest (in ₹)?
6. 6.Find the compound interest on ₹7200 at 20% per year for 2 years, compounded every year (in ₹).
7. 7.What amount will ₹4300 grow to in 2 years at 20% per year compound interest (in ₹)?
8. 8.What amount will ₹17200 grow to in 2 years at 15% per year compound interest (in ₹)?
9. 9.What amount will ₹40000 grow to in 3 years at 5% per year compound interest (in ₹)?
10. 10.What amount will ₹50700 grow to in 1 year at 5% per year compound interest (in ₹)?
11. 11.What is the difference between the compound interest and the simple interest on ₹60000 at 12% per year for 2 years (in ₹)?
12. 12.What amount will ₹46400 grow to in 2 years at 20% per year compound interest (in ₹)?
13. 13.What is the difference between the compound interest and the simple interest on ₹26000 at 25% per year for 2 years (in ₹)?
14. 14.A town has 8000 people. The population grows by 15% every year. What will the population be after 3 years?
15. 15.What is the difference between the compound interest and the simple interest on ₹16400 at 15% per year for 2 years (in ₹)?
16. 16.A scooter is worth ₹4200. Its value falls by 15% every year. What will it be worth after 1 year (in ₹)?
17. 17.A town has 40200 people. The population grows by 25% every year. What will the population be after 1 year?
18. 18.What amount will ₹25700 grow to in 1 year at 8% per year compound interest (in ₹)?
19. 19.What is the difference between the compound interest and the simple interest on ₹47500 at 4% per year for 2 years (in ₹)?
20. 20.A town has 48800 people. The population grows by 5% every year. What will the population be after 2 years?
21. 21.What amount will ₹8000 grow to in 3 years at 5% per year compound interest (in ₹)?
22. 22.What amount will ₹55300 grow to in 1 year at 5% per year compound interest (in ₹)?
23. 23.What is the difference between the compound interest and the simple interest on ₹35400 at 20% per year for 2 years (in ₹)?
24. 24.Find the compound interest on ₹57900 at 5% per year for 1 year, compounded every year (in ₹).
25. 25.What amount will ₹48200 grow to in 1 year at 4% per year compound interest (in ₹)?
26. 26.What is the difference between the compound interest and the simple interest on ₹50000 at 5% per year for 2 years (in ₹)?
27. 27.What is the difference between the compound interest and the simple interest on ₹21400 at 10% per year for 2 years (in ₹)?
28. 28.A scooter is worth ₹47000. Its value falls by 20% every year. What will it be worth after 2 years (in ₹)?
29. 29.Find the compound interest on ₹22500 at 4% per year for 2 years, compounded every year (in ₹).
30. 30.What is the difference between the compound interest and the simple interest on ₹42500 at 12% per year for 2 years (in ₹)?
31. 31.What is the difference between the compound interest and the simple interest on ₹12400 at 15% per year for 2 years (in ₹)?
32. 32.A town has 59200 people. The population grows by 10% every year. What will the population be after 2 years?
33. 33.A scooter is worth ₹41200. Its value falls by 15% every year. What will it be worth after 2 years (in ₹)?
34. 34.What amount will ₹12900 grow to in 1 year at 12% per year compound interest (in ₹)?
35. 35.Find the compound interest on ₹59600 at 15% per year for 2 years, compounded every year (in ₹).
36. 36.What is the difference between the compound interest and the simple interest on ₹15000 at 4% per year for 2 years (in ₹)?
37. 37.A scooter is worth ₹13600. Its value falls by 25% every year. What will it be worth after 2 years (in ₹)?
38. 38.What is the difference between the compound interest and the simple interest on ₹5000 at 4% per year for 2 years (in ₹)?
39. 39.A town has 22400 people. The population grows by 25% every year. What will the population be after 3 years?
40. 40.What is the difference between the compound interest and the simple interest on ₹30800 at 10% per year for 2 years (in ₹)?

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