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 ₹24000 at 15% per year for 2 years, compounded every year (in ₹).
- 2.What amount will ₹45200 grow to in 1 year at 20% per year compound interest (in ₹)?
- 3.Find the compound interest on ₹51500 at 5% per year for 1 year, compounded every year (in ₹).
- 4.Find the compound interest on ₹53000 at 10% per year for 3 years, compounded every year (in ₹).
- 5.A scooter is worth ₹41000. Its value falls by 12% every year. What will it be worth after 1 year (in ₹)?
- 6.What is the difference between the compound interest and the simple interest on ₹48400 at 25% per year for 2 years (in ₹)?
- 7.Find the compound interest on ₹52100 at 10% per year for 2 years, compounded every year (in ₹).
- 8.Find the compound interest on ₹46000 at 10% per year for 3 years, compounded every year (in ₹).
- 9.A scooter is worth ₹37500. Its value falls by 10% every year. What will it be worth after 1 year (in ₹)?
- 10.What is the difference between the compound interest and the simple interest on ₹10000 at 12% per year for 2 years (in ₹)?
- 11.What amount will ₹15300 grow to in 1 year at 25% per year compound interest (in ₹)?
- 12.Find the compound interest on ₹44300 at 12% per year for 1 year, compounded every year (in ₹).
- 13.A scooter is worth ₹9600. Its value falls by 25% every year. What will it be worth after 3 years (in ₹)?
- 14.A scooter is worth ₹48000. Its value falls by 5% every year. What will it be worth after 3 years (in ₹)?
- 15.What amount will ₹18800 grow to in 2 years at 5% per year compound interest (in ₹)?
- 16.Find the compound interest on ₹40000 at 15% per year for 3 years, compounded every year (in ₹).
- 17.Find the compound interest on ₹26700 at 12% per year for 1 year, compounded every year (in ₹).
- 18.A town has 31300 people. The population grows by 5% every year. What will the population be after 1 year?
- 19.Find the compound interest on ₹58000 at 10% per year for 3 years, compounded every year (in ₹).
- 20.Find the compound interest on ₹50700 at 12% per year for 1 year, compounded every year (in ₹).
- 21.A town has 17200 people. The population grows by 5% every year. What will the population be after 2 years?
- 22.A town has 43400 people. The population grows by 8% every year. What will the population be after 1 year?
- 23.Find the compound interest on ₹15000 at 12% per year for 2 years, compounded every year (in ₹).
- 24.A scooter is worth ₹6400. Its value falls by 25% every year. What will it be worth after 3 years (in ₹)?
- 25.Find the compound interest on ₹13000 at 20% per year for 3 years, compounded every year (in ₹).
- 26.A scooter is worth ₹14700. Its value falls by 20% every year. What will it be worth after 2 years (in ₹)?
- 27.What is the difference between the compound interest and the simple interest on ₹5200 at 25% per year for 2 years (in ₹)?
- 28.Find the compound interest on ₹25000 at 10% per year for 2 years, compounded every year (in ₹).
- 29.A scooter is worth ₹50000. Its value falls by 12% every year. What will it be worth after 2 years (in ₹)?
- 30.What is the difference between the compound interest and the simple interest on ₹32400 at 5% per year for 2 years (in ₹)?
- 31.Find the compound interest on ₹46200 at 4% per year for 1 year, compounded every year (in ₹).
- 32.What is the difference between the compound interest and the simple interest on ₹27600 at 15% per year for 2 years (in ₹)?
- 33.Find the compound interest on ₹25600 at 12% per year for 1 year, compounded every year (in ₹).
- 34.What is the difference between the compound interest and the simple interest on ₹27500 at 4% per year for 2 years (in ₹)?
- 35.What amount will ₹44400 grow to in 2 years at 25% per year compound interest (in ₹)?
- 36.What is the difference between the compound interest and the simple interest on ₹31200 at 25% per year for 2 years (in ₹)?
- 37.A scooter is worth ₹55100. Its value falls by 12% every year. What will it be worth after 1 year (in ₹)?
- 38.Find the compound interest on ₹37000 at 5% per year for 1 year, compounded every year (in ₹).
- 39.What amount will ₹11200 grow to in 3 years at 25% per year compound interest (in ₹)?
- 40.A town has 3200 people. The population grows by 25% every year. What will the population be after 3 years?
Answer key
- 7740
- 54240
- 2575
- 17543
- 36080
- 3025
- 10941
- 15226
- 33750
- 144
- 19125
- 5316
- 4050
- 41154
- 20727
- 20835
- 3204
- 32865
- 19198
- 6084
- 18963
- 46872
- 3816
- 2700
- 9464
- 9408
- 325
- 5250
- 38720
- 81
- 1848
- 621
- 3072
- 44
- 69375
- 1950
- 48488
- 1850
- 21875
- 6250
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