Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 193 · 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 ₹6400 grow to in 1 year at 20% per year compound interest (in ₹)?
2. 2.What is the difference between the compound interest and the simple interest on ₹34800 at 25% per year for 2 years (in ₹)?
3. 3.A town has 58800 people. The population grows by 20% every year. What will the population be after 1 year?
4. 4.A scooter is worth ₹38400. Its value falls by 15% every year. What will it be worth after 2 years (in ₹)?
5. 5.What amount will ₹8000 grow to in 3 years at 15% per year compound interest (in ₹)?
6. 6.What amount will ₹48800 grow to in 2 years at 15% per year compound interest (in ₹)?
7. 7.What amount will ₹24000 grow to in 3 years at 15% per year compound interest (in ₹)?
8. 8.What amount will ₹8000 grow to in 3 years at 5% per year compound interest (in ₹)?
9. 9.Find the compound interest on ₹33900 at 8% per year for 1 year, compounded every year (in ₹).
10. 10.Find the compound interest on ₹13600 at 4% per year for 1 year, compounded every year (in ₹).
11. 11.What amount will ₹32000 grow to in 3 years at 25% per year compound interest (in ₹)?
12. 12.What is the difference between the compound interest and the simple interest on ₹55000 at 8% per year for 2 years (in ₹)?
13. 13.A town has 20800 people. The population grows by 25% every year. What will the population be after 3 years?
14. 14.A scooter is worth ₹6800. Its value falls by 15% every year. What will it be worth after 2 years (in ₹)?
15. 15.A town has 12600 people. The population grows by 10% every year. What will the population be after 2 years?
16. 16.What is the difference between the compound interest and the simple interest on ₹59600 at 15% per year for 2 years (in ₹)?
17. 17.A scooter is worth ₹2600. Its value falls by 8% every year. What will it be worth after 1 year (in ₹)?
18. 18.What amount will ₹32000 grow to in 3 years at 15% per year compound interest (in ₹)?
19. 19.What is the difference between the compound interest and the simple interest on ₹50000 at 12% per year for 2 years (in ₹)?
20. 20.What amount will ₹16100 grow to in 1 year at 5% per year compound interest (in ₹)?
21. 21.What is the difference between the compound interest and the simple interest on ₹20000 at 25% per year for 2 years (in ₹)?
22. 22.What is the difference between the compound interest and the simple interest on ₹29200 at 5% per year for 2 years (in ₹)?
23. 23.What is the difference between the compound interest and the simple interest on ₹27500 at 4% per year for 2 years (in ₹)?
24. 24.What is the difference between the compound interest and the simple interest on ₹9300 at 20% per year for 2 years (in ₹)?
25. 25.A town has 17900 people. The population grows by 10% every year. What will the population be after 1 year?
26. 26.What amount will ₹41600 grow to in 3 years at 25% per year compound interest (in ₹)?
27. 27.What amount will ₹37700 grow to in 1 year at 20% per year compound interest (in ₹)?
28. 28.What is the difference between the compound interest and the simple interest on ₹43100 at 10% per year for 2 years (in ₹)?
29. 29.A scooter is worth ₹48000. Its value falls by 10% every year. What will it be worth after 1 year (in ₹)?
30. 30.A town has 10300 people. The population grows by 10% every year. What will the population be after 2 years?
31. 31.What amount will ₹40800 grow to in 2 years at 20% per year compound interest (in ₹)?
32. 32.What is the difference between the compound interest and the simple interest on ₹7500 at 8% per year for 2 years (in ₹)?
33. 33.Find the compound interest on ₹14400 at 25% per year for 3 years, compounded every year (in ₹).
34. 34.What is the difference between the compound interest and the simple interest on ₹25000 at 12% per year for 2 years (in ₹)?
35. 35.A scooter is worth ₹58000. Its value falls by 20% every year. What will it be worth after 2 years (in ₹)?
36. 36.What is the difference between the compound interest and the simple interest on ₹8000 at 15% per year for 2 years (in ₹)?
37. 37.What is the difference between the compound interest and the simple interest on ₹42100 at 20% per year for 2 years (in ₹)?
38. 38.A scooter is worth ₹9900. Its value falls by 10% every year. What will it be worth after 2 years (in ₹)?
39. 39.What amount will ₹10700 grow to in 1 year at 8% per year compound interest (in ₹)?
40. 40.What amount will ₹32500 grow to in 2 years at 12% per year compound interest (in ₹)?

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