Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 743 · 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 32800 people. The population grows by 5% every year. What will the population be after 2 years?
2. 2.What amount will ₹39600 grow to in 1 year at 10% per year compound interest (in ₹)?
3. 3.A town has 20000 people. The population grows by 20% every year. What will the population be after 3 years?
4. 4.Find the compound interest on ₹35000 at 8% per year for 2 years, compounded every year (in ₹).
5. 5.What amount will ₹47500 grow to in 2 years at 8% per year compound interest (in ₹)?
6. 6.A town has 44000 people. The population grows by 25% every year. What will the population be after 2 years?
7. 7.What is the difference between the compound interest and the simple interest on ₹25200 at 25% per year for 2 years (in ₹)?
8. 8.A town has 47500 people. The population grows by 12% every year. What will the population be after 2 years?
9. 9.Find the compound interest on ₹14600 at 15% per year for 1 year, compounded every year (in ₹).
10. 10.Find the compound interest on ₹47200 at 10% per year for 1 year, compounded every year (in ₹).
11. 11.A scooter is worth ₹37000. Its value falls by 10% every year. What will it be worth after 3 years (in ₹)?
12. 12.A town has 20900 people. The population grows by 12% every year. What will the population be after 1 year?
13. 13.What amount will ₹54400 grow to in 2 years at 5% per year compound interest (in ₹)?
14. 14.What is the difference between the compound interest and the simple interest on ₹25600 at 25% per year for 2 years (in ₹)?
15. 15.What is the difference between the compound interest and the simple interest on ₹32500 at 10% per year for 2 years (in ₹)?
16. 16.What is the difference between the compound interest and the simple interest on ₹26000 at 15% per year for 2 years (in ₹)?
17. 17.What is the difference between the compound interest and the simple interest on ₹3900 at 20% per year for 2 years (in ₹)?
18. 18.A scooter is worth ₹42800. Its value falls by 25% every year. What will it be worth after 2 years (in ₹)?
19. 19.A scooter is worth ₹5700. Its value falls by 10% every year. What will it be worth after 2 years (in ₹)?
20. 20.What is the difference between the compound interest and the simple interest on ₹32500 at 12% per year for 2 years (in ₹)?
21. 21.A town has 22800 people. The population grows by 5% every year. What will the population be after 2 years?
22. 22.What is the difference between the compound interest and the simple interest on ₹57700 at 20% per year for 2 years (in ₹)?
23. 23.What amount will ₹16000 grow to in 3 years at 5% per year compound interest (in ₹)?
24. 24.What amount will ₹30200 grow to in 1 year at 15% per year compound interest (in ₹)?
25. 25.Find the compound interest on ₹51300 at 10% per year for 2 years, compounded every year (in ₹).
26. 26.What amount will ₹31700 grow to in 1 year at 5% per year compound interest (in ₹)?
27. 27.What is the difference between the compound interest and the simple interest on ₹50000 at 5% per year for 2 years (in ₹)?
28. 28.A scooter is worth ₹17500. Its value falls by 4% every year. What will it be worth after 2 years (in ₹)?
29. 29.What amount will ₹20000 grow to in 2 years at 4% per year compound interest (in ₹)?
30. 30.What amount will ₹26000 grow to in 3 years at 20% per year compound interest (in ₹)?
31. 31.What is the difference between the compound interest and the simple interest on ₹26800 at 5% per year for 2 years (in ₹)?
32. 32.A town has 17500 people. The population grows by 15% every year. What will the population be after 1 year?
33. 33.What amount will ₹57000 grow to in 1 year at 4% per year compound interest (in ₹)?
34. 34.Find the compound interest on ₹38800 at 15% per year for 1 year, compounded every year (in ₹).
35. 35.Find the compound interest on ₹13700 at 15% per year for 1 year, compounded every year (in ₹).
36. 36.What is the difference between the compound interest and the simple interest on ₹25900 at 10% per year for 2 years (in ₹)?
37. 37.What amount will ₹59600 grow to in 2 years at 5% per year compound interest (in ₹)?
38. 38.Find the compound interest on ₹8000 at 20% per year for 3 years, compounded every year (in ₹).
39. 39.What is the difference between the compound interest and the simple interest on ₹2500 at 4% per year for 2 years (in ₹)?
40. 40.Find the compound interest on ₹15000 at 12% per year for 2 years, compounded every year (in ₹).

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