Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 121 · 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 scooter is worth ₹33000. Its value falls by 10% every year. What will it be worth after 3 years (in ₹)?
2. 2.Find the compound interest on ₹21000 at 20% per year for 1 year, compounded every year (in ₹).
3. 3.Find the compound interest on ₹57500 at 12% per year for 2 years, compounded every year (in ₹).
4. 4.Find the compound interest on ₹48300 at 10% per year for 1 year, compounded every year (in ₹).
5. 5.What is the difference between the compound interest and the simple interest on ₹8300 at 20% per year for 2 years (in ₹)?
6. 6.A scooter is worth ₹56900. Its value falls by 20% every year. What will it be worth after 2 years (in ₹)?
7. 7.What amount will ₹30800 grow to in 1 year at 12% per year compound interest (in ₹)?
8. 8.Find the compound interest on ₹35000 at 10% per year for 3 years, compounded every year (in ₹).
9. 9.What is the difference between the compound interest and the simple interest on ₹49600 at 25% per year for 2 years (in ₹)?
10. 10.What is the difference between the compound interest and the simple interest on ₹8800 at 5% per year for 2 years (in ₹)?
11. 11.Find the compound interest on ₹39600 at 5% per year for 2 years, compounded every year (in ₹).
12. 12.What is the difference between the compound interest and the simple interest on ₹46500 at 10% per year for 2 years (in ₹)?
13. 13.Find the compound interest on ₹19900 at 8% per year for 1 year, compounded every year (in ₹).
14. 14.A town has 7500 people. The population grows by 12% every year. What will the population be after 2 years?
15. 15.What amount will ₹22400 grow to in 3 years at 25% per year compound interest (in ₹)?
16. 16.What is the difference between the compound interest and the simple interest on ₹37200 at 25% per year for 2 years (in ₹)?
17. 17.Find the compound interest on ₹59700 at 15% per year for 1 year, compounded every year (in ₹).
18. 18.Find the compound interest on ₹25000 at 10% per year for 3 years, compounded every year (in ₹).
19. 19.What amount will ₹42500 grow to in 2 years at 12% per year compound interest (in ₹)?
20. 20.What is the difference between the compound interest and the simple interest on ₹20800 at 20% per year for 2 years (in ₹)?
21. 21.What amount will ₹4000 grow to in 2 years at 15% per year compound interest (in ₹)?
22. 22.What is the difference between the compound interest and the simple interest on ₹7600 at 25% per year for 2 years (in ₹)?
23. 23.What amount will ₹53500 grow to in 1 year at 25% per year compound interest (in ₹)?
24. 24.What is the difference between the compound interest and the simple interest on ₹20000 at 8% per year for 2 years (in ₹)?
25. 25.Find the compound interest on ₹2300 at 8% per year for 1 year, compounded every year (in ₹).
26. 26.A scooter is worth ₹48400. Its value falls by 12% every year. What will it be worth after 1 year (in ₹)?
27. 27.What is the difference between the compound interest and the simple interest on ₹46400 at 25% per year for 2 years (in ₹)?
28. 28.Find the compound interest on ₹42800 at 4% per year for 1 year, compounded every year (in ₹).
29. 29.What is the difference between the compound interest and the simple interest on ₹15000 at 4% per year for 2 years (in ₹)?
30. 30.What is the difference between the compound interest and the simple interest on ₹17500 at 4% per year for 2 years (in ₹)?
31. 31.What amount will ₹8600 grow to in 2 years at 10% per year compound interest (in ₹)?
32. 32.A scooter is worth ₹42500. Its value falls by 10% every year. What will it be worth after 1 year (in ₹)?
33. 33.A town has 6000 people. The population grows by 10% every year. What will the population be after 3 years?
34. 34.What is the difference between the compound interest and the simple interest on ₹25000 at 12% per year for 2 years (in ₹)?
35. 35.Find the compound interest on ₹6800 at 15% per year for 1 year, compounded every year (in ₹).
36. 36.What amount will ₹30900 grow to in 1 year at 12% per year compound interest (in ₹)?
37. 37.A scooter is worth ₹3100. Its value falls by 10% every year. What will it be worth after 1 year (in ₹)?
38. 38.Find the compound interest on ₹52800 at 20% per year for 1 year, compounded every year (in ₹).
39. 39.What amount will ₹4700 grow to in 2 years at 10% per year compound interest (in ₹)?
40. 40.What is the difference between the compound interest and the simple interest on ₹2500 at 4% per year for 2 years (in ₹)?

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