Class 8 Maths Worksheet: Compound Interest
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.
NameDateTime takenScore ___ / 40
- 1.Find the compound interest on ₹52000 at 10% per year for 3 years, compounded every year (in ₹).
- 2.What is the difference between the compound interest and the simple interest on ₹41200 at 25% per year for 2 years (in ₹)?
- 3.What is the difference between the compound interest and the simple interest on ₹52100 at 10% per year for 2 years (in ₹)?
- 4.What is the difference between the compound interest and the simple interest on ₹2500 at 12% per year for 2 years (in ₹)?
- 5.Find the compound interest on ₹22500 at 4% per year for 2 years, compounded every year (in ₹).
- 6.Find the compound interest on ₹9600 at 25% per year for 3 years, compounded every year (in ₹).
- 7.What is the difference between the compound interest and the simple interest on ₹5000 at 8% per year for 2 years (in ₹)?
- 8.A town has 18800 people. The population grows by 15% every year. What will the population be after 2 years?
- 9.A scooter is worth ₹12800. Its value falls by 25% every year. What will it be worth after 3 years (in ₹)?
- 10.What amount will ₹50500 grow to in 1 year at 10% per year compound interest (in ₹)?
- 11.Find the compound interest on ₹51200 at 25% per year for 3 years, compounded every year (in ₹).
- 12.What amount will ₹8800 grow to in 2 years at 10% per year compound interest (in ₹)?
- 13.What amount will ₹12800 grow to in 3 years at 25% per year compound interest (in ₹)?
- 14.What amount will ₹7000 grow to in 1 year at 5% per year compound interest (in ₹)?
- 15.A town has 11200 people. The population grows by 25% every year. What will the population be after 3 years?
- 16.What amount will ₹56000 grow to in 3 years at 10% per year compound interest (in ₹)?
- 17.Find the compound interest on ₹50000 at 10% per year for 3 years, compounded every year (in ₹).
- 18.Find the compound interest on ₹2500 at 12% per year for 2 years, compounded every year (in ₹).
- 19.A town has 13600 people. The population grows by 10% every year. What will the population be after 2 years?
- 20.What amount will ₹29900 grow to in 1 year at 5% per year compound interest (in ₹)?
- 21.What is the difference between the compound interest and the simple interest on ₹7500 at 10% per year for 2 years (in ₹)?
- 22.A scooter is worth ₹32500. Its value falls by 12% every year. What will it be worth after 2 years (in ₹)?
- 23.Find the compound interest on ₹3600 at 10% per year for 1 year, compounded every year (in ₹).
- 24.What is the difference between the compound interest and the simple interest on ₹32500 at 8% per year for 2 years (in ₹)?
- 25.What amount will ₹24000 grow to in 3 years at 5% per year compound interest (in ₹)?
- 26.Find the compound interest on ₹19600 at 20% per year for 1 year, compounded every year (in ₹).
- 27.Find the compound interest on ₹6000 at 10% per year for 3 years, compounded every year (in ₹).
- 28.A scooter is worth ₹34100. Its value falls by 5% every year. What will it be worth after 1 year (in ₹)?
- 29.What amount will ₹6000 grow to in 3 years at 20% per year compound interest (in ₹)?
- 30.What amount will ₹35200 grow to in 2 years at 15% per year compound interest (in ₹)?
- 31.Find the compound interest on ₹4300 at 10% per year for 1 year, compounded every year (in ₹).
- 32.Find the compound interest on ₹50700 at 12% per year for 1 year, compounded every year (in ₹).
- 33.What amount will ₹10500 grow to in 2 years at 10% per year compound interest (in ₹)?
- 34.What is the difference between the compound interest and the simple interest on ₹10000 at 8% per year for 2 years (in ₹)?
- 35.What amount will ₹12000 grow to in 3 years at 10% per year compound interest (in ₹)?
- 36.Find the compound interest on ₹5000 at 12% per year for 2 years, compounded every year (in ₹).
- 37.A town has 7500 people. The population grows by 12% every year. What will the population be after 2 years?
- 38.A scooter is worth ₹12500. Its value falls by 10% every year. What will it be worth after 1 year (in ₹)?
- 39.What amount will ₹32000 grow to in 3 years at 5% per year compound interest (in ₹)?
- 40.Find the compound interest on ₹11800 at 4% per year for 1 year, compounded every year (in ₹).
Answer key
- 17212
- 2575
- 521
- 36
- 1836
- 9150
- 32
- 24863
- 5400
- 55550
- 48800
- 10648
- 25000
- 7350
- 21875
- 74536
- 16550
- 636
- 16456
- 31395
- 75
- 25168
- 360
- 208
- 27783
- 3920
- 1986
- 32395
- 10368
- 46552
- 430
- 6084
- 12705
- 64
- 15972
- 1272
- 9408
- 11250
- 37044
- 472
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