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 ₹24800 at 5% per year for 2 years, compounded every year (in ₹).
- 2.What is the difference between the compound interest and the simple interest on ₹17500 at 8% per year for 2 years (in ₹)?
- 3.What is the difference between the compound interest and the simple interest on ₹30000 at 8% per year for 2 years (in ₹)?
- 4.A town has 44800 people. The population grows by 25% every year. What will the population be after 3 years?
- 5.A town has 28700 people. The population grows by 8% every year. What will the population be after 1 year?
- 6.Find the compound interest on ₹10000 at 4% per year for 2 years, compounded every year (in ₹).
- 7.A town has 9900 people. The population grows by 5% every year. What will the population be after 1 year?
- 8.Find the compound interest on ₹16700 at 10% per year for 2 years, compounded every year (in ₹).
- 9.Find the compound interest on ₹5700 at 4% per year for 1 year, compounded every year (in ₹).
- 10.A scooter is worth ₹20000. Its value falls by 12% every year. What will it be worth after 2 years (in ₹)?
- 11.What is the difference between the compound interest and the simple interest on ₹2900 at 10% per year for 2 years (in ₹)?
- 12.Find the compound interest on ₹8000 at 5% per year for 3 years, compounded every year (in ₹).
- 13.What is the difference between the compound interest and the simple interest on ₹2500 at 4% per year for 2 years (in ₹)?
- 14.Find the compound interest on ₹4800 at 25% per year for 1 year, compounded every year (in ₹).
- 15.What amount will ₹27500 grow to in 2 years at 4% per year compound interest (in ₹)?
- 16.Find the compound interest on ₹59200 at 25% per year for 3 years, compounded every year (in ₹).
- 17.A scooter is worth ₹16000. Its value falls by 5% every year. What will it be worth after 3 years (in ₹)?
- 18.What is the difference between the compound interest and the simple interest on ₹30000 at 12% per year for 2 years (in ₹)?
- 19.A town has 40900 people. The population grows by 5% every year. What will the population be after 1 year?
- 20.Find the compound interest on ₹2400 at 15% per year for 2 years, compounded every year (in ₹).
- 21.What amount will ₹45600 grow to in 1 year at 4% per year compound interest (in ₹)?
- 22.What amount will ₹42600 grow to in 1 year at 10% per year compound interest (in ₹)?
- 23.Find the compound interest on ₹54000 at 20% per year for 3 years, compounded every year (in ₹).
- 24.What is the difference between the compound interest and the simple interest on ₹54800 at 25% per year for 2 years (in ₹)?
- 25.Find the compound interest on ₹30000 at 12% per year for 2 years, compounded every year (in ₹).
- 26.Find the compound interest on ₹52800 at 15% per year for 2 years, compounded every year (in ₹).
- 27.What amount will ₹50700 grow to in 1 year at 5% per year compound interest (in ₹)?
- 28.What amount will ₹56800 grow to in 1 year at 25% per year compound interest (in ₹)?
- 29.A scooter is worth ₹9900. Its value falls by 4% every year. What will it be worth after 1 year (in ₹)?
- 30.What amount will ₹8000 grow to in 3 years at 25% per year compound interest (in ₹)?
- 31.Find the compound interest on ₹15800 at 8% per year for 1 year, compounded every year (in ₹).
- 32.What amount will ₹38900 grow to in 2 years at 20% per year compound interest (in ₹)?
- 33.What is the difference between the compound interest and the simple interest on ₹10500 at 10% per year for 2 years (in ₹)?
- 34.What is the difference between the compound interest and the simple interest on ₹50000 at 8% per year for 2 years (in ₹)?
- 35.What is the difference between the compound interest and the simple interest on ₹22500 at 8% per year for 2 years (in ₹)?
- 36.What amount will ₹22600 grow to in 2 years at 10% per year compound interest (in ₹)?
- 37.Find the compound interest on ₹36100 at 12% per year for 1 year, compounded every year (in ₹).
- 38.What is the difference between the compound interest and the simple interest on ₹12500 at 4% per year for 2 years (in ₹)?
- 39.A scooter is worth ₹52000. Its value falls by 10% every year. What will it be worth after 1 year (in ₹)?
- 40.Find the compound interest on ₹49600 at 25% per year for 3 years, compounded every year (in ₹).
Answer key
- 2542
- 112
- 192
- 87500
- 30996
- 816
- 10395
- 3507
- 228
- 15488
- 29
- 1261
- 4
- 1200
- 29744
- 56425
- 13718
- 432
- 42945
- 774
- 47424
- 46860
- 39312
- 3425
- 7632
- 17028
- 53235
- 71000
- 9504
- 15625
- 1264
- 56016
- 105
- 320
- 144
- 27346
- 4332
- 20
- 46800
- 47275
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