Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 851 · 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 47900 people. The population grows by 15% every year. What will the population be after 1 year?
2. 2.What amount will ₹7500 grow to in 2 years at 8% per year compound interest (in ₹)?
3. 3.A town has 55000 people. The population grows by 20% every year. What will the population be after 2 years?
4. 4.Find the compound interest on ₹33300 at 4% per year for 1 year, compounded every year (in ₹).
5. 5.What is the difference between the compound interest and the simple interest on ₹16300 at 20% per year for 2 years (in ₹)?
6. 6.What is the difference between the compound interest and the simple interest on ₹11900 at 20% per year for 2 years (in ₹)?
7. 7.What is the difference between the compound interest and the simple interest on ₹2000 at 25% per year for 2 years (in ₹)?
8. 8.A scooter is worth ₹55500. Its value falls by 20% every year. What will it be worth after 3 years (in ₹)?
9. 9.Find the compound interest on ₹24000 at 15% per year for 3 years, compounded every year (in ₹).
10. 10.A town has 48400 people. The population grows by 5% every year. What will the population be after 2 years?
11. 11.What amount will ₹41000 grow to in 3 years at 10% per year compound interest (in ₹)?
12. 12.What is the difference between the compound interest and the simple interest on ₹58500 at 10% per year for 2 years (in ₹)?
13. 13.Find the compound interest on ₹24000 at 5% per year for 3 years, compounded every year (in ₹).
14. 14.What amount will ₹56000 grow to in 3 years at 15% per year compound interest (in ₹)?
15. 15.What amount will ₹52600 grow to in 1 year at 8% per year compound interest (in ₹)?
16. 16.What is the difference between the compound interest and the simple interest on ₹32900 at 20% per year for 2 years (in ₹)?
17. 17.A scooter is worth ₹7500. Its value falls by 4% every year. What will it be worth after 2 years (in ₹)?
18. 18.What amount will ₹2100 grow to in 2 years at 10% per year compound interest (in ₹)?
19. 19.Find the compound interest on ₹23000 at 25% per year for 1 year, compounded every year (in ₹).
20. 20.Find the compound interest on ₹32500 at 4% per year for 2 years, compounded every year (in ₹).
21. 21.Find the compound interest on ₹19000 at 12% per year for 1 year, compounded every year (in ₹).
22. 22.A town has 9200 people. The population grows by 25% every year. What will the population be after 2 years?
23. 23.A scooter is worth ₹44500. Its value falls by 20% every year. What will it be worth after 2 years (in ₹)?
24. 24.What amount will ₹8000 grow to in 3 years at 15% per year compound interest (in ₹)?
25. 25.What is the difference between the compound interest and the simple interest on ₹42500 at 4% per year for 2 years (in ₹)?
26. 26.What is the difference between the compound interest and the simple interest on ₹17500 at 8% per year for 2 years (in ₹)?
27. 27.Find the compound interest on ₹59100 at 20% per year for 1 year, compounded every year (in ₹).
28. 28.What amount will ₹8000 grow to in 3 years at 5% per year compound interest (in ₹)?
29. 29.Find the compound interest on ₹42800 at 25% per year for 2 years, compounded every year (in ₹).
30. 30.A town has 45600 people. The population grows by 25% every year. What will the population be after 1 year?
31. 31.Find the compound interest on ₹32000 at 10% per year for 3 years, compounded every year (in ₹).
32. 32.Find the compound interest on ₹12500 at 20% per year for 2 years, compounded every year (in ₹).
33. 33.What amount will ₹10200 grow to in 2 years at 10% per year compound interest (in ₹)?
34. 34.Find the compound interest on ₹10300 at 20% per year for 2 years, compounded every year (in ₹).
35. 35.Find the compound interest on ₹48500 at 20% per year for 2 years, compounded every year (in ₹).
36. 36.Find the compound interest on ₹8100 at 20% per year for 1 year, compounded every year (in ₹).
37. 37.Find the compound interest on ₹34800 at 8% per year for 1 year, compounded every year (in ₹).
38. 38.Find the compound interest on ₹24600 at 8% per year for 1 year, compounded every year (in ₹).
39. 39.What is the difference between the compound interest and the simple interest on ₹57500 at 8% per year for 2 years (in ₹)?
40. 40.A town has 56000 people. The population grows by 5% every year. What will the population be after 3 years?

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