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 ₹27500 grow to in 1 year at 25% per year compound interest (in ₹)?
- 2.A scooter is worth ₹50200. Its value falls by 12% every year. What will it be worth after 1 year (in ₹)?
- 3.Find the compound interest on ₹50000 at 4% per year for 2 years, compounded every year (in ₹).
- 4.What amount will ₹9100 grow to in 1 year at 12% per year compound interest (in ₹)?
- 5.A scooter is worth ₹12100. Its value falls by 5% every year. What will it be worth after 1 year (in ₹)?
- 6.Find the compound interest on ₹12800 at 12% per year for 1 year, compounded every year (in ₹).
- 7.What amount will ₹57500 grow to in 2 years at 4% per year compound interest (in ₹)?
- 8.Find the compound interest on ₹56000 at 5% per year for 3 years, compounded every year (in ₹).
- 9.What is the difference between the compound interest and the simple interest on ₹34000 at 25% per year for 2 years (in ₹)?
- 10.Find the compound interest on ₹42700 at 4% per year for 1 year, compounded every year (in ₹).
- 11.Find the compound interest on ₹40000 at 15% per year for 3 years, compounded every year (in ₹).
- 12.What is the difference between the compound interest and the simple interest on ₹40000 at 8% per year for 2 years (in ₹)?
- 13.What amount will ₹37400 grow to in 1 year at 8% per year compound interest (in ₹)?
- 14.What is the difference between the compound interest and the simple interest on ₹31600 at 25% per year for 2 years (in ₹)?
- 15.Find the compound interest on ₹47500 at 4% per year for 2 years, compounded every year (in ₹).
- 16.What amount will ₹35400 grow to in 1 year at 25% per year compound interest (in ₹)?
- 17.What is the difference between the compound interest and the simple interest on ₹17300 at 20% per year for 2 years (in ₹)?
- 18.What is the difference between the compound interest and the simple interest on ₹20400 at 15% per year for 2 years (in ₹)?
- 19.Find the compound interest on ₹32900 at 10% per year for 1 year, compounded every year (in ₹).
- 20.A town has 45400 people. The population grows by 25% every year. What will the population be after 1 year?
- 21.Find the compound interest on ₹33200 at 5% per year for 2 years, compounded every year (in ₹).
- 22.What amount will ₹9900 grow to in 1 year at 5% per year compound interest (in ₹)?
- 23.A town has 13100 people. The population grows by 20% every year. What will the population be after 1 year?
- 24.What is the difference between the compound interest and the simple interest on ₹11800 at 10% per year for 2 years (in ₹)?
- 25.A scooter is worth ₹45500. Its value falls by 12% every year. What will it be worth after 1 year (in ₹)?
- 26.Find the compound interest on ₹12200 at 10% per year for 2 years, compounded every year (in ₹).
- 27.Find the compound interest on ₹17500 at 12% per year for 2 years, compounded every year (in ₹).
- 28.Find the compound interest on ₹52000 at 5% per year for 2 years, compounded every year (in ₹).
- 29.Find the compound interest on ₹38800 at 10% per year for 1 year, compounded every year (in ₹).
- 30.What amount will ₹12700 grow to in 1 year at 5% per year compound interest (in ₹)?
- 31.What amount will ₹39900 grow to in 1 year at 5% per year compound interest (in ₹)?
- 32.Find the compound interest on ₹16400 at 10% per year for 2 years, compounded every year (in ₹).
- 33.A scooter is worth ₹32800. Its value falls by 25% every year. What will it be worth after 2 years (in ₹)?
- 34.Find the compound interest on ₹22000 at 10% per year for 1 year, compounded every year (in ₹).
- 35.What is the difference between the compound interest and the simple interest on ₹52500 at 4% per year for 2 years (in ₹)?
- 36.What is the difference between the compound interest and the simple interest on ₹24400 at 15% per year for 2 years (in ₹)?
- 37.What is the difference between the compound interest and the simple interest on ₹27300 at 20% per year for 2 years (in ₹)?
- 38.What amount will ₹26000 grow to in 3 years at 10% per year compound interest (in ₹)?
- 39.What is the difference between the compound interest and the simple interest on ₹44800 at 25% per year for 2 years (in ₹)?
- 40.What is the difference between the compound interest and the simple interest on ₹22400 at 5% per year for 2 years (in ₹)?
Answer key
- 34375
- 44176
- 4080
- 10192
- 11495
- 1536
- 62192
- 8827
- 2125
- 1708
- 20835
- 256
- 40392
- 1975
- 3876
- 44250
- 692
- 459
- 3290
- 56750
- 3403
- 10395
- 15720
- 118
- 40040
- 2562
- 4452
- 5330
- 3880
- 13335
- 41895
- 3444
- 18450
- 2200
- 84
- 549
- 1092
- 34606
- 2800
- 56
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