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.What amount will ₹18400 grow to in 1 year at 25% per year compound interest (in ₹)?
- 2.Find the compound interest on ₹17500 at 4% per year for 2 years, compounded every year (in ₹).
- 3.Find the compound interest on ₹15600 at 8% per year for 1 year, compounded every year (in ₹).
- 4.What amount will ₹54000 grow to in 2 years at 15% per year compound interest (in ₹)?
- 5.What amount will ₹32000 grow to in 3 years at 5% per year compound interest (in ₹)?
- 6.Find the compound interest on ₹16100 at 4% per year for 1 year, compounded every year (in ₹).
- 7.What is the difference between the compound interest and the simple interest on ₹2400 at 15% per year for 2 years (in ₹)?
- 8.A scooter is worth ₹19600. Its value falls by 25% every year. What will it be worth after 2 years (in ₹)?
- 9.A town has 6400 people. The population grows by 25% every year. What will the population be after 2 years?
- 10.What amount will ₹44800 grow to in 3 years at 25% per year compound interest (in ₹)?
- 11.What amount will ₹3300 grow to in 2 years at 20% per year compound interest (in ₹)?
- 12.A scooter is worth ₹44700. Its value falls by 8% every year. What will it be worth after 1 year (in ₹)?
- 13.What amount will ₹12500 grow to in 2 years at 8% per year compound interest (in ₹)?
- 14.Find the compound interest on ₹51300 at 5% per year for 1 year, compounded every year (in ₹).
- 15.A scooter is worth ₹8400. Its value falls by 15% every year. What will it be worth after 2 years (in ₹)?
- 16.What amount will ₹5500 grow to in 1 year at 5% per year compound interest (in ₹)?
- 17.A town has 47100 people. The population grows by 5% every year. What will the population be after 1 year?
- 18.What amount will ₹14800 grow to in 2 years at 5% per year compound interest (in ₹)?
- 19.A scooter is worth ₹57600. Its value falls by 5% every year. What will it be worth after 2 years (in ₹)?
- 20.A town has 36800 people. The population grows by 5% every year. What will the population be after 2 years?
- 21.What is the difference between the compound interest and the simple interest on ₹25600 at 10% per year for 2 years (in ₹)?
- 22.What is the difference between the compound interest and the simple interest on ₹52300 at 10% per year for 2 years (in ₹)?
- 23.What amount will ₹49600 grow to in 3 years at 25% per year compound interest (in ₹)?
- 24.A town has 17600 people. The population grows by 5% every year. What will the population be after 2 years?
- 25.Find the compound interest on ₹31700 at 10% per year for 2 years, compounded every year (in ₹).
- 26.A town has 24000 people. The population grows by 20% every year. What will the population be after 1 year?
- 27.What amount will ₹37300 grow to in 1 year at 5% per year compound interest (in ₹)?
- 28.A scooter is worth ₹57500. Its value falls by 4% every year. What will it be worth after 2 years (in ₹)?
- 29.A scooter is worth ₹22000. Its value falls by 5% every year. What will it be worth after 2 years (in ₹)?
- 30.What amount will ₹34100 grow to in 1 year at 8% per year compound interest (in ₹)?
- 31.Find the compound interest on ₹56000 at 5% per year for 3 years, compounded every year (in ₹).
- 32.What is the difference between the compound interest and the simple interest on ₹47500 at 12% per year for 2 years (in ₹)?
- 33.A town has 8000 people. The population grows by 10% every year. What will the population be after 3 years?
- 34.Find the compound interest on ₹17500 at 20% per year for 1 year, compounded every year (in ₹).
- 35.Find the compound interest on ₹55000 at 4% per year for 2 years, compounded every year (in ₹).
- 36.What is the difference between the compound interest and the simple interest on ₹13600 at 15% per year for 2 years (in ₹)?
- 37.What amount will ₹26900 grow to in 1 year at 5% per year compound interest (in ₹)?
- 38.What is the difference between the compound interest and the simple interest on ₹28800 at 15% per year for 2 years (in ₹)?
- 39.Find the compound interest on ₹58600 at 4% per year for 1 year, compounded every year (in ₹).
- 40.What amount will ₹45600 grow to in 2 years at 20% per year compound interest (in ₹)?
Answer key
- 23000
- 1428
- 1248
- 71415
- 37044
- 644
- 54
- 11025
- 10000
- 87500
- 4752
- 41124
- 14580
- 2565
- 6069
- 5775
- 49455
- 16317
- 51984
- 40572
- 256
- 523
- 96875
- 19404
- 6657
- 28800
- 39165
- 52992
- 19855
- 36828
- 8827
- 684
- 10648
- 3500
- 4488
- 306
- 28245
- 648
- 2344
- 65664
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