Class 8 Maths Worksheet: Compound Interest

Maths worksheets lesson 63: Compound interest · Set 781 · 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 51600 people. The population grows by 25% every year. What will the population be after 2 years?
2. 2.A scooter is worth ₹22900. Its value falls by 8% every year. What will it be worth after 1 year (in ₹)?
3. 3.What amount will ₹25100 grow to in 1 year at 15% per year compound interest (in ₹)?
4. 4.A town has 47200 people. The population grows by 20% every year. What will the population be after 2 years?
5. 5.What amount will ₹21700 grow to in 1 year at 20% per year compound interest (in ₹)?
6. 6.A town has 32000 people. The population grows by 10% every year. What will the population be after 1 year?
7. 7.A town has 19200 people. The population grows by 15% every year. What will the population be after 2 years?
8. 8.Find the compound interest on ₹60000 at 25% per year for 2 years, compounded every year (in ₹).
9. 9.Find the compound interest on ₹32400 at 25% per year for 2 years, compounded every year (in ₹).
10. 10.Find the compound interest on ₹41600 at 10% per year for 2 years, compounded every year (in ₹).
11. 11.Find the compound interest on ₹20700 at 10% per year for 1 year, compounded every year (in ₹).
12. 12.Find the compound interest on ₹31200 at 25% per year for 1 year, compounded every year (in ₹).
13. 13.A town has 34000 people. The population grows by 10% every year. What will the population be after 3 years?
14. 14.What is the difference between the compound interest and the simple interest on ₹49300 at 20% per year for 2 years (in ₹)?
15. 15.What amount will ₹45000 grow to in 3 years at 10% per year compound interest (in ₹)?
16. 16.What amount will ₹34000 grow to in 3 years at 20% per year compound interest (in ₹)?
17. 17.What is the difference between the compound interest and the simple interest on ₹51600 at 25% per year for 2 years (in ₹)?
18. 18.A town has 24000 people. The population grows by 15% every year. What will the population be after 3 years?
19. 19.What amount will ₹3900 grow to in 2 years at 20% per year compound interest (in ₹)?
20. 20.Find the compound interest on ₹4200 at 10% per year for 2 years, compounded every year (in ₹).
21. 21.What amount will ₹55600 grow to in 2 years at 15% per year compound interest (in ₹)?
22. 22.What amount will ₹31000 grow to in 1 year at 12% per year compound interest (in ₹)?
23. 23.What amount will ₹8600 grow to in 1 year at 5% per year compound interest (in ₹)?
24. 24.What amount will ₹16000 grow to in 3 years at 5% per year compound interest (in ₹)?
25. 25.Find the compound interest on ₹19400 at 20% per year for 1 year, compounded every year (in ₹).
26. 26.What amount will ₹28500 grow to in 1 year at 12% per year compound interest (in ₹)?
27. 27.A scooter is worth ₹44100. Its value falls by 4% every year. What will it be worth after 1 year (in ₹)?
28. 28.A scooter is worth ₹59100. Its value falls by 4% every year. What will it be worth after 1 year (in ₹)?
29. 29.What is the difference between the compound interest and the simple interest on ₹2000 at 15% per year for 2 years (in ₹)?
30. 30.What is the difference between the compound interest and the simple interest on ₹29600 at 5% per year for 2 years (in ₹)?
31. 31.What is the difference between the compound interest and the simple interest on ₹27600 at 5% per year for 2 years (in ₹)?
32. 32.Find the compound interest on ₹32000 at 15% per year for 3 years, compounded every year (in ₹).
33. 33.What is the difference between the compound interest and the simple interest on ₹14100 at 20% per year for 2 years (in ₹)?
34. 34.Find the compound interest on ₹39900 at 25% per year for 1 year, compounded every year (in ₹).
35. 35.What amount will ₹16100 grow to in 1 year at 10% per year compound interest (in ₹)?
36. 36.Find the compound interest on ₹9600 at 5% per year for 2 years, compounded every year (in ₹).
37. 37.What amount will ₹59800 grow to in 1 year at 25% per year compound interest (in ₹)?
38. 38.What is the difference between the compound interest and the simple interest on ₹42800 at 25% per year for 2 years (in ₹)?
39. 39.Find the compound interest on ₹40000 at 25% per year for 3 years, compounded every year (in ₹).
40. 40.What amount will ₹11500 grow to in 2 years at 20% per year compound interest (in ₹)?

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