Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 645 · 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.What amount will ₹40000 grow to in 2 years at 15% per year compound interest (in ₹)?
2. 2.What amount will ₹31400 grow to in 1 year at 5% per year compound interest (in ₹)?
3. 3.What is the difference between the compound interest and the simple interest on ₹32100 at 20% per year for 2 years (in ₹)?
4. 4.What is the difference between the compound interest and the simple interest on ₹27400 at 20% per year for 2 years (in ₹)?
5. 5.What amount will ₹54400 grow to in 2 years at 5% per year compound interest (in ₹)?
6. 6.A town has 8300 people. The population grows by 20% every year. What will the population be after 1 year?
7. 7.What amount will ₹39800 grow to in 1 year at 5% per year compound interest (in ₹)?
8. 8.A town has 5600 people. The population grows by 5% every year. What will the population be after 2 years?
9. 9.What is the difference between the compound interest and the simple interest on ₹50200 at 10% per year for 2 years (in ₹)?
10. 10.Find the compound interest on ₹54000 at 15% per year for 1 year, compounded every year (in ₹).
11. 11.What is the difference between the compound interest and the simple interest on ₹21100 at 10% per year for 2 years (in ₹)?
12. 12.What is the difference between the compound interest and the simple interest on ₹55300 at 20% per year for 2 years (in ₹)?
13. 13.What amount will ₹49400 grow to in 1 year at 20% per year compound interest (in ₹)?
14. 14.A town has 41200 people. The population grows by 15% every year. What will the population be after 2 years?
15. 15.What amount will ₹30000 grow to in 2 years at 12% per year compound interest (in ₹)?
16. 16.Find the compound interest on ₹29400 at 8% per year for 1 year, compounded every year (in ₹).
17. 17.What amount will ₹32200 grow to in 1 year at 4% per year compound interest (in ₹)?
18. 18.What is the difference between the compound interest and the simple interest on ₹60000 at 5% per year for 2 years (in ₹)?
19. 19.What is the difference between the compound interest and the simple interest on ₹19400 at 20% per year for 2 years (in ₹)?
20. 20.Find the compound interest on ₹17500 at 15% per year for 1 year, compounded every year (in ₹).
21. 21.What is the difference between the compound interest and the simple interest on ₹15000 at 4% per year for 2 years (in ₹)?
22. 22.What amount will ₹23600 grow to in 2 years at 15% per year compound interest (in ₹)?
23. 23.What is the difference between the compound interest and the simple interest on ₹16400 at 10% per year for 2 years (in ₹)?
24. 24.What is the difference between the compound interest and the simple interest on ₹36000 at 15% per year for 2 years (in ₹)?
25. 25.What is the difference between the compound interest and the simple interest on ₹10800 at 5% per year for 2 years (in ₹)?
26. 26.What amount will ₹1600 grow to in 3 years at 25% per year compound interest (in ₹)?
27. 27.A town has 35200 people. The population grows by 25% every year. What will the population be after 2 years?
28. 28.A town has 32500 people. The population grows by 12% every year. What will the population be after 2 years?
29. 29.What is the difference between the compound interest and the simple interest on ₹21500 at 20% per year for 2 years (in ₹)?
30. 30.Find the compound interest on ₹32500 at 4% per year for 2 years, compounded every year (in ₹).
31. 31.A scooter is worth ₹32000. Its value falls by 5% every year. What will it be worth after 3 years (in ₹)?
32. 32.A scooter is worth ₹51200. Its value falls by 25% every year. What will it be worth after 3 years (in ₹)?
33. 33.What is the difference between the compound interest and the simple interest on ₹18500 at 20% per year for 2 years (in ₹)?
34. 34.What is the difference between the compound interest and the simple interest on ₹38400 at 5% per year for 2 years (in ₹)?
35. 35.What amount will ₹35500 grow to in 1 year at 12% per year compound interest (in ₹)?
36. 36.What is the difference between the compound interest and the simple interest on ₹6400 at 5% per year for 2 years (in ₹)?
37. 37.Find the compound interest on ₹4000 at 4% per year for 1 year, compounded every year (in ₹).
38. 38.A town has 10700 people. The population grows by 25% every year. What will the population be after 1 year?
39. 39.A town has 11200 people. The population grows by 25% every year. What will the population be after 1 year?
40. 40.Find the compound interest on ₹8000 at 5% per year for 3 years, compounded every year (in ₹).

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