Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 530 · 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 36900 people. The population grows by 20% every year. What will the population be after 1 year?
2. 2.What is the difference between the compound interest and the simple interest on ₹12500 at 8% per year for 2 years (in ₹)?
3. 3.What amount will ₹12400 grow to in 2 years at 5% per year compound interest (in ₹)?
4. 4.What amount will ₹8000 grow to in 3 years at 15% per year compound interest (in ₹)?
5. 5.What amount will ₹48000 grow to in 1 year at 25% per year compound interest (in ₹)?
6. 6.What is the difference between the compound interest and the simple interest on ₹3900 at 10% per year for 2 years (in ₹)?
7. 7.Find the compound interest on ₹22500 at 12% per year for 2 years, compounded every year (in ₹).
8. 8.What is the difference between the compound interest and the simple interest on ₹47500 at 4% per year for 2 years (in ₹)?
9. 9.What amount will ₹16000 grow to in 3 years at 25% per year compound interest (in ₹)?
10. 10.What is the difference between the compound interest and the simple interest on ₹45100 at 20% per year for 2 years (in ₹)?
11. 11.A scooter is worth ₹42700. Its value falls by 5% every year. What will it be worth after 1 year (in ₹)?
12. 12.What is the difference between the compound interest and the simple interest on ₹6400 at 15% per year for 2 years (in ₹)?
13. 13.What amount will ₹19400 grow to in 1 year at 25% per year compound interest (in ₹)?
14. 14.Find the compound interest on ₹8000 at 8% per year for 1 year, compounded every year (in ₹).
15. 15.A town has 15700 people. The population grows by 10% every year. What will the population be after 1 year?
16. 16.Find the compound interest on ₹45000 at 12% per year for 2 years, compounded every year (in ₹).
17. 17.What is the difference between the compound interest and the simple interest on ₹10800 at 5% per year for 2 years (in ₹)?
18. 18.What amount will ₹7500 grow to in 2 years at 8% per year compound interest (in ₹)?
19. 19.What amount will ₹37700 grow to in 1 year at 8% per year compound interest (in ₹)?
20. 20.Find the compound interest on ₹17000 at 10% per year for 3 years, compounded every year (in ₹).
21. 21.Find the compound interest on ₹26000 at 15% per year for 2 years, compounded every year (in ₹).
22. 22.Find the compound interest on ₹24000 at 5% per year for 3 years, compounded every year (in ₹).
23. 23.What amount will ₹43000 grow to in 3 years at 20% per year compound interest (in ₹)?
24. 24.What amount will ₹13500 grow to in 2 years at 10% per year compound interest (in ₹)?
25. 25.What is the difference between the compound interest and the simple interest on ₹40400 at 15% per year for 2 years (in ₹)?
26. 26.What is the difference between the compound interest and the simple interest on ₹32000 at 15% per year for 2 years (in ₹)?
27. 27.What amount will ₹8800 grow to in 1 year at 4% per year compound interest (in ₹)?
28. 28.A town has 36000 people. The population grows by 15% every year. What will the population be after 2 years?
29. 29.Find the compound interest on ₹40000 at 5% per year for 3 years, compounded every year (in ₹).
30. 30.What amount will ₹14900 grow to in 1 year at 15% per year compound interest (in ₹)?
31. 31.A scooter is worth ₹57700. Its value falls by 20% every year. What will it be worth after 1 year (in ₹)?
32. 32.What amount will ₹55400 grow to in 1 year at 12% per year compound interest (in ₹)?
33. 33.A town has 53000 people. The population grows by 10% every year. What will the population be after 3 years?
34. 34.A town has 5200 people. The population grows by 5% every year. What will the population be after 2 years?
35. 35.Find the compound interest on ₹45600 at 25% per year for 2 years, compounded every year (in ₹).
36. 36.What is the difference between the compound interest and the simple interest on ₹14400 at 20% per year for 2 years (in ₹)?
37. 37.What amount will ₹20400 grow to in 2 years at 5% per year compound interest (in ₹)?
38. 38.What is the difference between the compound interest and the simple interest on ₹13600 at 15% per year for 2 years (in ₹)?
39. 39.A town has 37200 people. The population grows by 10% every year. What will the population be after 1 year?
40. 40.What is the difference between the compound interest and the simple interest on ₹27200 at 10% per year for 2 years (in ₹)?

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