Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 380 · 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 40000 people. The population grows by 15% every year. What will the population be after 3 years?
2. 2.A scooter is worth ₹32500. Its value falls by 12% every year. What will it be worth after 2 years (in ₹)?
3. 3.What amount will ₹27500 grow to in 2 years at 4% per year compound interest (in ₹)?
4. 4.What is the difference between the compound interest and the simple interest on ₹2400 at 5% per year for 2 years (in ₹)?
5. 5.What amount will ₹36600 grow to in 1 year at 12% per year compound interest (in ₹)?
6. 6.What is the difference between the compound interest and the simple interest on ₹47200 at 5% per year for 2 years (in ₹)?
7. 7.Find the compound interest on ₹32000 at 5% per year for 3 years, compounded every year (in ₹).
8. 8.A town has 53600 people. The population grows by 15% every year. What will the population be after 2 years?
9. 9.A town has 12500 people. The population grows by 5% every year. What will the population be after 1 year?
10. 10.What amount will ₹35800 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 ₹53600 at 25% per year for 2 years (in ₹)?
12. 12.What amount will ₹58400 grow to in 2 years at 25% per year compound interest (in ₹)?
13. 13.What is the difference between the compound interest and the simple interest on ₹30400 at 5% per year for 2 years (in ₹)?
14. 14.What amount will ₹17600 grow to in 1 year at 5% per year compound interest (in ₹)?
15. 15.A town has 31400 people. The population grows by 20% every year. What will the population be after 1 year?
16. 16.Find the compound interest on ₹19600 at 15% per year for 2 years, compounded every year (in ₹).
17. 17.A town has 48000 people. The population grows by 5% every year. What will the population be after 3 years?
18. 18.Find the compound interest on ₹48800 at 15% per year for 2 years, compounded every year (in ₹).
19. 19.Find the compound interest on ₹27500 at 5% per year for 1 year, compounded every year (in ₹).
20. 20.What is the difference between the compound interest and the simple interest on ₹42700 at 10% per year for 2 years (in ₹)?
21. 21.A scooter is worth ₹35700. Its value falls by 8% every year. What will it be worth after 1 year (in ₹)?
22. 22.What amount will ₹32000 grow to in 3 years at 15% per year compound interest (in ₹)?
23. 23.A town has 48000 people. The population grows by 15% every year. What will the population be after 2 years?
24. 24.Find the compound interest on ₹3100 at 5% per year for 1 year, compounded every year (in ₹).
25. 25.Find the compound interest on ₹8200 at 10% per year for 2 years, compounded every year (in ₹).
26. 26.Find the compound interest on ₹3800 at 15% per year for 1 year, compounded every year (in ₹).
27. 27.What amount will ₹47100 grow to in 1 year at 12% per year compound interest (in ₹)?
28. 28.What amount will ₹19300 grow to in 1 year at 10% per year compound interest (in ₹)?
29. 29.What is the difference between the compound interest and the simple interest on ₹5700 at 10% per year for 2 years (in ₹)?
30. 30.Find the compound interest on ₹10500 at 20% per year for 3 years, compounded every year (in ₹).
31. 31.A scooter is worth ₹36400. Its value falls by 25% every year. What will it be worth after 2 years (in ₹)?
32. 32.Find the compound interest on ₹26300 at 5% per year for 1 year, compounded every year (in ₹).
33. 33.What amount will ₹9600 grow to in 1 year at 5% per year compound interest (in ₹)?
34. 34.What amount will ₹8800 grow to in 2 years at 25% per year compound interest (in ₹)?
35. 35.What amount will ₹7200 grow to in 2 years at 5% per year compound interest (in ₹)?
36. 36.What is the difference between the compound interest and the simple interest on ₹40000 at 12% per year for 2 years (in ₹)?
37. 37.What is the difference between the compound interest and the simple interest on ₹45200 at 10% per year for 2 years (in ₹)?
38. 38.What amount will ₹15000 grow to in 3 years at 10% per year compound interest (in ₹)?
39. 39.Find the compound interest on ₹26400 at 12% per year for 1 year, compounded every year (in ₹).
40. 40.Find the compound interest on ₹16000 at 5% per year for 3 years, compounded every year (in ₹).

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