Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 702 · 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 54000 people. The population grows by 20% every year. What will the population be after 3 years?
2. 2.Find the compound interest on ₹48000 at 15% per year for 3 years, compounded every year (in ₹).
3. 3.Find the compound interest on ₹14800 at 8% per year for 1 year, compounded every year (in ₹).
4. 4.A scooter is worth ₹32800. Its value falls by 25% every year. What will it be worth after 2 years (in ₹)?
5. 5.A town has 30700 people. The population grows by 8% 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 ₹34800 at 25% per year for 2 years (in ₹)?
7. 7.A town has 18500 people. The population grows by 20% every year. What will the population be after 3 years?
8. 8.A scooter is worth ₹37300. Its value falls by 25% every year. What will it be worth after 1 year (in ₹)?
9. 9.A scooter is worth ₹36000. Its value falls by 10% every year. What will it be worth after 3 years (in ₹)?
10. 10.What is the difference between the compound interest and the simple interest on ₹50000 at 12% per year for 2 years (in ₹)?
11. 11.A town has 52500 people. The population grows by 8% every year. What will the population be after 2 years?
12. 12.What amount will ₹8000 grow to in 3 years at 15% per year compound interest (in ₹)?
13. 13.What is the difference between the compound interest and the simple interest on ₹44200 at 20% per year for 2 years (in ₹)?
14. 14.What is the difference between the compound interest and the simple interest on ₹17600 at 15% per year for 2 years (in ₹)?
15. 15.What amount will ₹57500 grow to in 2 years at 4% per year compound interest (in ₹)?
16. 16.What amount will ₹8200 grow to in 1 year at 10% per year compound interest (in ₹)?
17. 17.What amount will ₹26000 grow to in 1 year at 12% per year compound interest (in ₹)?
18. 18.What amount will ₹10800 grow to in 2 years at 5% per year compound interest (in ₹)?
19. 19.What is the difference between the compound interest and the simple interest on ₹15600 at 10% per year for 2 years (in ₹)?
20. 20.What amount will ₹32500 grow to in 2 years at 12% per year compound interest (in ₹)?
21. 21.Find the compound interest on ₹22600 at 5% per year for 1 year, compounded every year (in ₹).
22. 22.A town has 35600 people. The population grows by 5% every year. What will the population be after 2 years?
23. 23.What is the difference between the compound interest and the simple interest on ₹52000 at 5% per year for 2 years (in ₹)?
24. 24.Find the compound interest on ₹28800 at 15% per year for 1 year, compounded every year (in ₹).
25. 25.What amount will ₹10800 grow to in 2 years at 25% per year compound interest (in ₹)?
26. 26.A town has 39600 people. The population grows by 25% every year. What will the population be after 1 year?
27. 27.What amount will ₹22000 grow to in 3 years at 10% per year compound interest (in ₹)?
28. 28.What amount will ₹35500 grow to in 3 years at 20% per year compound interest (in ₹)?
29. 29.What is the difference between the compound interest and the simple interest on ₹45000 at 4% per year for 2 years (in ₹)?
30. 30.What is the difference between the compound interest and the simple interest on ₹55600 at 15% per year for 2 years (in ₹)?
31. 31.What amount will ₹57600 grow to in 3 years at 25% per year compound interest (in ₹)?
32. 32.What is the difference between the compound interest and the simple interest on ₹5000 at 12% per year for 2 years (in ₹)?
33. 33.What is the difference between the compound interest and the simple interest on ₹8400 at 5% per year for 2 years (in ₹)?
34. 34.Find the compound interest on ₹26400 at 25% per year for 2 years, compounded every year (in ₹).
35. 35.What is the difference between the compound interest and the simple interest on ₹44700 at 10% per year for 2 years (in ₹)?
36. 36.What is the difference between the compound interest and the simple interest on ₹55000 at 12% per year for 2 years (in ₹)?
37. 37.What is the difference between the compound interest and the simple interest on ₹12500 at 12% per year for 2 years (in ₹)?
38. 38.A scooter is worth ₹30000. Its value falls by 10% every year. What will it be worth after 3 years (in ₹)?
39. 39.What is the difference between the compound interest and the simple interest on ₹7500 at 8% per year for 2 years (in ₹)?
40. 40.A scooter is worth ₹39400. Its value falls by 10% every year. What will it be worth after 1 year (in ₹)?

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