Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 421 · 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 59200 people. The population grows by 5% every year. What will the population be after 2 years?
2. 2.A town has 28600 people. The population grows by 20% every year. What will the population be after 2 years?
3. 3.A scooter is worth ₹8000. Its value falls by 5% every year. What will it be worth after 3 years (in ₹)?
4. 4.What is the difference between the compound interest and the simple interest on ₹16500 at 20% per year for 2 years (in ₹)?
5. 5.A town has 24400 people. The population grows by 25% every year. What will the population be after 1 year?
6. 6.What is the difference between the compound interest and the simple interest on ₹55000 at 12% per year for 2 years (in ₹)?
7. 7.A town has 3000 people. The population grows by 20% every year. What will the population be after 2 years?
8. 8.A scooter is worth ₹47600. Its value falls by 25% every year. What will it be worth after 2 years (in ₹)?
9. 9.Find the compound interest on ₹49200 at 15% per year for 2 years, compounded every year (in ₹).
10. 10.What amount will ₹8000 grow to in 3 years at 5% per year compound interest (in ₹)?
11. 11.A scooter is worth ₹56000. Its value falls by 15% every year. What will it be worth after 3 years (in ₹)?
12. 12.A town has 48000 people. The population grows by 5% every year. What will the population be after 3 years?
13. 13.Find the compound interest on ₹45200 at 25% per year for 2 years, compounded every year (in ₹).
14. 14.Find the compound interest on ₹31200 at 20% per year for 1 year, compounded every year (in ₹).
15. 15.What amount will ₹59200 grow to in 2 years at 5% per year compound interest (in ₹)?
16. 16.Find the compound interest on ₹5200 at 15% per year for 2 years, compounded every year (in ₹).
17. 17.What is the difference between the compound interest and the simple interest on ₹37500 at 12% per year for 2 years (in ₹)?
18. 18.What is the difference between the compound interest and the simple interest on ₹17600 at 5% per year for 2 years (in ₹)?
19. 19.What is the difference between the compound interest and the simple interest on ₹34000 at 15% per year for 2 years (in ₹)?
20. 20.A scooter is worth ₹37000. Its value falls by 8% every year. What will it be worth after 1 year (in ₹)?
21. 21.What is the difference between the compound interest and the simple interest on ₹8400 at 25% per year for 2 years (in ₹)?
22. 22.What is the difference between the compound interest and the simple interest on ₹10000 at 4% per year for 2 years (in ₹)?
23. 23.What amount will ₹7500 grow to in 2 years at 4% per year compound interest (in ₹)?
24. 24.What is the difference between the compound interest and the simple interest on ₹15000 at 12% per year for 2 years (in ₹)?
25. 25.Find the compound interest on ₹40000 at 15% per year for 3 years, compounded every year (in ₹).
26. 26.What is the difference between the compound interest and the simple interest on ₹14900 at 20% per year for 2 years (in ₹)?
27. 27.What amount will ₹45900 grow to in 1 year at 25% per year compound interest (in ₹)?
28. 28.Find the compound interest on ₹12900 at 25% per year for 1 year, compounded every year (in ₹).
29. 29.What amount will ₹24000 grow to in 3 years at 15% per year compound interest (in ₹)?
30. 30.Find the compound interest on ₹32000 at 5% per year for 2 years, compounded every year (in ₹).
31. 31.Find the compound interest on ₹35000 at 4% per year for 2 years, compounded every year (in ₹).
32. 32.What amount will ₹57900 grow to in 1 year at 4% per year compound interest (in ₹)?
33. 33.Find the compound interest on ₹49600 at 25% per year for 2 years, compounded every year (in ₹).
34. 34.A town has 21000 people. The population grows by 10% every year. What will the population be after 3 years?
35. 35.A town has 8100 people. The population grows by 4% every year. What will the population be after 1 year?
36. 36.Find the compound interest on ₹9000 at 8% per year for 1 year, compounded every year (in ₹).
37. 37.What is the difference between the compound interest and the simple interest on ₹44800 at 15% per year for 2 years (in ₹)?
38. 38.Find the compound interest on ₹40400 at 15% per year for 2 years, compounded every year (in ₹).
39. 39.Find the compound interest on ₹9800 at 4% per year for 1 year, compounded every year (in ₹).
40. 40.Find the compound interest on ₹51700 at 4% per year for 1 year, compounded every year (in ₹).

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