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 ₹17600 at 8% per year for 1 year, compounded every year (in ₹).
- 2.What is the difference between the compound interest and the simple interest on ₹28800 at 20% per year for 2 years (in ₹)?
- 3.What amount will ₹35000 grow to in 2 years at 12% per year compound interest (in ₹)?
- 4.A town has 59200 people. The population grows by 25% every year. What will the population be after 2 years?
- 5.What amount will ₹38600 grow to in 1 year at 8% per year compound interest (in ₹)?
- 6.What is the difference between the compound interest and the simple interest on ₹42500 at 8% per year for 2 years (in ₹)?
- 7.What amount will ₹4500 grow to in 1 year at 25% per year compound interest (in ₹)?
- 8.A town has 32500 people. The population grows by 12% every year. What will the population be after 2 years?
- 9.Find the compound interest on ₹45000 at 12% per year for 2 years, compounded every year (in ₹).
- 10.A town has 33600 people. The population grows by 5% every year. What will the population be after 1 year?
- 11.What is the difference between the compound interest and the simple interest on ₹17500 at 8% per year for 2 years (in ₹)?
- 12.Find the compound interest on ₹40600 at 20% per year for 2 years, compounded every year (in ₹).
- 13.What amount will ₹56000 grow to in 3 years at 5% per year compound interest (in ₹)?
- 14.What amount will ₹42500 grow to in 2 years at 12% per year compound interest (in ₹)?
- 15.What amount will ₹40000 grow to in 3 years at 5% per year compound interest (in ₹)?
- 16.What is the difference between the compound interest and the simple interest on ₹7200 at 25% per year for 2 years (in ₹)?
- 17.What is the difference between the compound interest and the simple interest on ₹21200 at 25% per year for 2 years (in ₹)?
- 18.A town has 28100 people. The population grows by 5% every year. What will the population be after 1 year?
- 19.What amount will ₹10000 grow to in 2 years at 12% per year compound interest (in ₹)?
- 20.Find the compound interest on ₹32000 at 5% per year for 3 years, compounded every year (in ₹).
- 21.A town has 57900 people. The population grows by 5% every year. What will the population be after 1 year?
- 22.What is the difference between the compound interest and the simple interest on ₹35000 at 12% per year for 2 years (in ₹)?
- 23.What is the difference between the compound interest and the simple interest on ₹56900 at 10% per year for 2 years (in ₹)?
- 24.Find the compound interest on ₹5000 at 12% per year for 2 years, compounded every year (in ₹).
- 25.What is the difference between the compound interest and the simple interest on ₹47500 at 4% per year for 2 years (in ₹)?
- 26.Find the compound interest on ₹40000 at 5% per year for 3 years, compounded every year (in ₹).
- 27.A town has 26000 people. The population grows by 10% every year. What will the population be after 3 years?
- 28.What amount will ₹8000 grow to in 3 years at 10% per year compound interest (in ₹)?
- 29.What is the difference between the compound interest and the simple interest on ₹16400 at 5% per year for 2 years (in ₹)?
- 30.What is the difference between the compound interest and the simple interest on ₹35000 at 8% per year for 2 years (in ₹)?
- 31.What is the difference between the compound interest and the simple interest on ₹58000 at 5% per year for 2 years (in ₹)?
- 32.What amount will ₹37200 grow to in 1 year at 5% per year compound interest (in ₹)?
- 33.A town has 12400 people. The population grows by 8% every year. What will the population be after 1 year?
- 34.What is the difference between the compound interest and the simple interest on ₹12000 at 5% per year for 2 years (in ₹)?
- 35.What amount will ₹8000 grow to in 3 years at 15% per year compound interest (in ₹)?
- 36.Find the compound interest on ₹10400 at 25% per year for 1 year, compounded every year (in ₹).
- 37.Find the compound interest on ₹28400 at 10% per year for 2 years, compounded every year (in ₹).
- 38.What is the difference between the compound interest and the simple interest on ₹43200 at 5% per year for 2 years (in ₹)?
- 39.What amount will ₹32000 grow to in 3 years at 15% per year compound interest (in ₹)?
- 40.Find the compound interest on ₹43700 at 20% per year for 1 year, compounded every year (in ₹).
Answer key
- 1408
- 1152
- 43904
- 92500
- 41688
- 272
- 5625
- 40768
- 11448
- 35280
- 112
- 17864
- 64827
- 53312
- 46305
- 450
- 1325
- 29505
- 12544
- 5044
- 60795
- 504
- 569
- 1272
- 76
- 6305
- 34606
- 10648
- 41
- 224
- 145
- 39060
- 13392
- 30
- 12167
- 2600
- 5964
- 108
- 48668
- 8740
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