Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 134 · 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 57000 people. The population grows by 4% every year. What will the population be after 1 year?
2. 2.Find the compound interest on ₹39900 at 8% per year for 1 year, compounded every year (in ₹).
3. 3.What amount will ₹56800 grow to in 1 year at 20% per year compound interest (in ₹)?
4. 4.What amount will ₹21400 grow to in 1 year at 10% per year compound interest (in ₹)?
5. 5.Find the compound interest on ₹15000 at 12% per year for 2 years, compounded every year (in ₹).
6. 6.What is the difference between the compound interest and the simple interest on ₹54100 at 20% per year for 2 years (in ₹)?
7. 7.What is the difference between the compound interest and the simple interest on ₹58400 at 25% per year for 2 years (in ₹)?
8. 8.What amount will ₹32500 grow to in 2 years at 8% per year compound interest (in ₹)?
9. 9.What amount will ₹17300 grow to in 2 years at 10% per year compound interest (in ₹)?
10. 10.What is the difference between the compound interest and the simple interest on ₹40400 at 25% per year for 2 years (in ₹)?
11. 11.Find the compound interest on ₹2000 at 20% per year for 3 years, compounded every year (in ₹).
12. 12.What is the difference between the compound interest and the simple interest on ₹50000 at 8% per year for 2 years (in ₹)?
13. 13.Find the compound interest on ₹14200 at 25% per year for 1 year, compounded every year (in ₹).
14. 14.What amount will ₹54800 grow to in 1 year at 15% per year compound interest (in ₹)?
15. 15.A town has 12900 people. The population grows by 8% every year. What will the population be after 1 year?
16. 16.Find the compound interest on ₹2600 at 10% per year for 1 year, compounded every year (in ₹).
17. 17.Find the compound interest on ₹49500 at 20% per year for 3 years, compounded every year (in ₹).
18. 18.What amount will ₹41600 grow to in 1 year at 25% per year compound interest (in ₹)?
19. 19.What amount will ₹15300 grow to in 1 year at 12% per year compound interest (in ₹)?
20. 20.What amount will ₹27800 grow to in 2 years at 20% per year compound interest (in ₹)?
21. 21.What is the difference between the compound interest and the simple interest on ₹37700 at 10% per year for 2 years (in ₹)?
22. 22.Find the compound interest on ₹52600 at 10% per year for 2 years, compounded every year (in ₹).
23. 23.What amount will ₹16000 grow to in 3 years at 15% per year compound interest (in ₹)?
24. 24.What amount will ₹11200 grow to in 1 year at 4% per year compound interest (in ₹)?
25. 25.What amount will ₹8000 grow to in 3 years at 15% per year compound interest (in ₹)?
26. 26.Find the compound interest on ₹48500 at 20% per year for 3 years, compounded every year (in ₹).
27. 27.Find the compound interest on ₹48000 at 5% per year for 3 years, compounded every year (in ₹).
28. 28.What is the difference between the compound interest and the simple interest on ₹27500 at 4% per year for 2 years (in ₹)?
29. 29.What amount will ₹37500 grow to in 2 years at 12% per year compound interest (in ₹)?
30. 30.A scooter is worth ₹48000. Its value falls by 25% every year. What will it be worth after 3 years (in ₹)?
31. 31.A scooter is worth ₹19000. Its value falls by 10% every year. What will it be worth after 3 years (in ₹)?
32. 32.What is the difference between the compound interest and the simple interest on ₹20400 at 15% per year for 2 years (in ₹)?
33. 33.A town has 28400 people. The population grows by 5% every year. What will the population be after 2 years?
34. 34.Find the compound interest on ₹7400 at 10% per year for 1 year, compounded every year (in ₹).
35. 35.What is the difference between the compound interest and the simple interest on ₹10000 at 12% per year for 2 years (in ₹)?
36. 36.What is the difference between the compound interest and the simple interest on ₹26000 at 15% per year for 2 years (in ₹)?
37. 37.Find the compound interest on ₹13700 at 8% per year for 1 year, compounded every year (in ₹).
38. 38.A scooter is worth ₹24000. Its value falls by 5% every year. What will it be worth after 3 years (in ₹)?
39. 39.Find the compound interest on ₹39000 at 20% per year for 3 years, compounded every year (in ₹).
40. 40.A scooter is worth ₹6200. Its value falls by 20% every year. What will it be worth after 1 year (in ₹)?

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