Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 205 · 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 45000 people. The population grows by 20% every year. What will the population be after 3 years?
2. 2.A town has 40800 people. The population grows by 15% every year. What will the population be after 1 year?
3. 3.What is the difference between the compound interest and the simple interest on ₹35700 at 20% per year for 2 years (in ₹)?
4. 4.What amount will ₹51200 grow to in 3 years at 25% per year compound interest (in ₹)?
5. 5.Find the compound interest on ₹54900 at 15% per year for 1 year, compounded every year (in ₹).
6. 6.What amount will ₹47200 grow to in 1 year at 8% per year compound interest (in ₹)?
7. 7.A scooter is worth ₹11000. Its value falls by 20% every year. What will it be worth after 3 years (in ₹)?
8. 8.What amount will ₹60000 grow to in 2 years at 8% per year compound interest (in ₹)?
9. 9.What amount will ₹20500 grow to in 3 years at 20% per year compound interest (in ₹)?
10. 10.A town has 48800 people. The population grows by 10% every year. What will the population be after 2 years?
11. 11.A town has 16600 people. The population grows by 10% every year. What will the population be after 1 year?
12. 12.What amount will ₹52400 grow to in 1 year at 5% per year compound interest (in ₹)?
13. 13.What amount will ₹3700 grow to in 2 years at 20% per year compound interest (in ₹)?
14. 14.What is the difference between the compound interest and the simple interest on ₹40400 at 5% per year for 2 years (in ₹)?
15. 15.What is the difference between the compound interest and the simple interest on ₹27400 at 20% per year for 2 years (in ₹)?
16. 16.Find the compound interest on ₹57600 at 25% per year for 2 years, compounded every year (in ₹).
17. 17.Find the compound interest on ₹16400 at 15% per year for 2 years, compounded every year (in ₹).
18. 18.Find the compound interest on ₹44500 at 12% per year for 1 year, compounded every year (in ₹).
19. 19.Find the compound interest on ₹7200 at 10% per year for 2 years, compounded every year (in ₹).
20. 20.A town has 16000 people. The population grows by 4% every year. What will the population be after 1 year?
21. 21.Find the compound interest on ₹22500 at 4% per year for 2 years, compounded every year (in ₹).
22. 22.What is the difference between the compound interest and the simple interest on ₹53200 at 5% per year for 2 years (in ₹)?
23. 23.A town has 40000 people. The population grows by 10% every year. What will the population be after 3 years?
24. 24.What is the difference between the compound interest and the simple interest on ₹52000 at 5% per year for 2 years (in ₹)?
25. 25.Find the compound interest on ₹30000 at 8% per year for 2 years, compounded every year (in ₹).
26. 26.What is the difference between the compound interest and the simple interest on ₹31000 at 10% per year for 2 years (in ₹)?
27. 27.What amount will ₹40000 grow to in 3 years at 5% per year compound interest (in ₹)?
28. 28.A scooter is worth ₹47500. Its value falls by 12% every year. What will it be worth after 2 years (in ₹)?
29. 29.What is the difference between the compound interest and the simple interest on ₹15000 at 12% per year for 2 years (in ₹)?
30. 30.Find the compound interest on ₹2600 at 4% per year for 1 year, compounded every year (in ₹).
31. 31.What amount will ₹30800 grow to in 2 years at 25% per year compound interest (in ₹)?
32. 32.A town has 44800 people. The population grows by 25% every year. What will the population be after 2 years?
33. 33.What amount will ₹53400 grow to in 1 year at 20% per year compound interest (in ₹)?
34. 34.What amount will ₹14300 grow to in 2 years at 20% per year compound interest (in ₹)?
35. 35.Find the compound interest on ₹39500 at 5% per year for 1 year, compounded every year (in ₹).
36. 36.What amount will ₹14400 grow to in 2 years at 20% per year compound interest (in ₹)?
37. 37.What amount will ₹6500 grow to in 3 years at 20% per year compound interest (in ₹)?
38. 38.What is the difference between the compound interest and the simple interest on ₹17400 at 20% per year for 2 years (in ₹)?
39. 39.Find the compound interest on ₹3000 at 20% per year for 1 year, compounded every year (in ₹).
40. 40.A scooter is worth ₹33100. Its value falls by 10% every year. What will it be worth after 2 years (in ₹)?

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