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 is the difference between the compound interest and the simple interest on ₹14800 at 5% per year for 2 years (in ₹)?
- 2.A scooter is worth ₹47900. Its value falls by 25% every year. What will it be worth after 1 year (in ₹)?
- 3.A scooter is worth ₹38900. Its value falls by 25% every year. What will it be worth after 1 year (in ₹)?
- 4.What amount will ₹20000 grow to in 3 years at 20% per year compound interest (in ₹)?
- 5.Find the compound interest on ₹12800 at 25% per year for 3 years, compounded every year (in ₹).
- 6.Find the compound interest on ₹48000 at 10% per year for 3 years, compounded every year (in ₹).
- 7.Find the compound interest on ₹57200 at 20% per year for 2 years, compounded every year (in ₹).
- 8.What amount will ₹16300 grow to in 1 year at 8% per year compound interest (in ₹)?
- 9.What is the difference between the compound interest and the simple interest on ₹50000 at 4% per year for 2 years (in ₹)?
- 10.What amount will ₹37200 grow to in 2 years at 25% per year compound interest (in ₹)?
- 11.Find the compound interest on ₹12000 at 10% per year for 1 year, compounded every year (in ₹).
- 12.Find the compound interest on ₹38400 at 25% per year for 3 years, compounded every year (in ₹).
- 13.What is the difference between the compound interest and the simple interest on ₹7500 at 12% per year for 2 years (in ₹)?
- 14.Find the compound interest on ₹45000 at 12% per year for 2 years, compounded every year (in ₹).
- 15.What amount will ₹47500 grow to in 2 years at 8% per year compound interest (in ₹)?
- 16.What is the difference between the compound interest and the simple interest on ₹40000 at 15% per year for 2 years (in ₹)?
- 17.Find the compound interest on ₹14400 at 5% per year for 1 year, compounded every year (in ₹).
- 18.What is the difference between the compound interest and the simple interest on ₹17200 at 15% per year for 2 years (in ₹)?
- 19.Find the compound interest on ₹45300 at 15% per year for 1 year, compounded every year (in ₹).
- 20.What amount will ₹4400 grow to in 2 years at 10% per year compound interest (in ₹)?
- 21.Find the compound interest on ₹20300 at 12% per year for 1 year, compounded every year (in ₹).
- 22.What is the difference between the compound interest and the simple interest on ₹22400 at 5% per year for 2 years (in ₹)?
- 23.What is the difference between the compound interest and the simple interest on ₹15000 at 8% per year for 2 years (in ₹)?
- 24.Find the compound interest on ₹11200 at 25% per year for 3 years, compounded every year (in ₹).
- 25.Find the compound interest on ₹27700 at 25% per year for 1 year, compounded every year (in ₹).
- 26.What amount will ₹39700 grow to in 1 year at 4% per year compound interest (in ₹)?
- 27.Find the compound interest on ₹24500 at 12% per year for 1 year, compounded every year (in ₹).
- 28.What is the difference between the compound interest and the simple interest on ₹13600 at 15% per year for 2 years (in ₹)?
- 29.What amount will ₹32800 grow to in 1 year at 12% per year compound interest (in ₹)?
- 30.Find the compound interest on ₹14600 at 8% per year for 1 year, compounded every year (in ₹).
- 31.What amount will ₹25900 grow to in 1 year at 4% per year compound interest (in ₹)?
- 32.A scooter is worth ₹13200. Its value falls by 5% every year. What will it be worth after 2 years (in ₹)?
- 33.What amount will ₹2500 grow to in 2 years at 12% per year compound interest (in ₹)?
- 34.Find the compound interest on ₹17500 at 12% per year for 2 years, compounded every year (in ₹).
- 35.What amount will ₹3700 grow to in 1 year at 8% per year compound interest (in ₹)?
- 36.Find the compound interest on ₹40000 at 15% per year for 3 years, compounded every year (in ₹).
- 37.Find the compound interest on ₹16000 at 5% per year for 3 years, compounded every year (in ₹).
- 38.A town has 24000 people. The population grows by 15% every year. What will the population be after 3 years?
- 39.Find the compound interest on ₹53000 at 10% per year for 3 years, compounded every year (in ₹).
- 40.A town has 2000 people. The population grows by 5% every year. What will the population be after 2 years?
Answer key
- 37
- 35925
- 29175
- 34560
- 12200
- 15888
- 25168
- 17604
- 80
- 58125
- 1200
- 36600
- 108
- 11448
- 55404
- 900
- 720
- 387
- 6795
- 5324
- 2436
- 56
- 96
- 10675
- 6925
- 41288
- 2940
- 306
- 36736
- 1168
- 26936
- 11913
- 3136
- 4452
- 3996
- 20835
- 2522
- 36501
- 17543
- 2205
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