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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 775 · 40 questions
TalentJR

The method (Start value is 100%): New value after a rise of p%: value + p% of value. After a fall: value − p% of value. Percent change = change ÷ starting value × 100. Two changes a% and b% one after the other: a + b + (a × b) ÷ 100, with a fall counted as minus.

NameDateTime takenScore ___ / 40
  1. 1.A water tank holds 2800 litres. 40% of the water is used. How many litres are left?
  2. 2.A water tank holds 3080 litres. 10% of the water is used. How many litres are left?
  3. 3.A shop sells 1880 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  4. 4.A water tank holds 1740 litres. 40% of the water is used. How many litres are left?
  5. 5.A water tank holds 4480 litres. 5% of the water is used. How many litres are left?
  6. 6.A water tank holds 1120 litres. 30% of the water is used. How many litres are left?
  7. 7.The price of a bicycle is ₹840. It goes up by 15%. What is the new price (in ₹)?
  8. 8.A price goes up by 20% and then comes down by 15%. By what percent has it gone up in all? =
  9. 9.The price of a school bag changes from ₹680 to ₹748. By what percent did it go up?
  10. 10.The price of a school bag changes from ₹4440 to ₹3108. By what percent did it come down?
  11. 11.A price comes down by 40% and then comes down by 30% more. By what percent has it come down in all? =
  12. 12.The price of a school bag changes from ₹2780 to ₹1390. By what percent did it come down?
  13. 13.A town has 1920 people. Its population grows by 10%. How many people live there now?
  14. 14.A price goes up by 40% and then comes down by 20%. By what percent has it gone up in all? =
  15. 15.A price comes down by 50% and then comes down by 15% more. By what percent has it come down in all? =
  16. 16.A water tank holds 1940 litres. 25% of the water is used. How many litres are left?
  17. 17.The price of a school bag changes from ₹1600 to ₹2400. By what percent did it go up?
  18. 18.The price of a school bag changes from ₹2300 to ₹3220. By what percent did it go up?
  19. 19.The price of a school bag changes from ₹4320 to ₹4104. By what percent did it come down?
  20. 20.The price of a school bag changes from ₹1160 to ₹1276. By what percent did it go up?
  21. 21.A shop sells 3960 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  22. 22.A shop sells 2280 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  23. 23.A shop sells 3940 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  24. 24.The price of a school bag changes from ₹2140 to ₹2996. By what percent did it go up?
  25. 25.A price goes up by 30% and then goes up by 30% more. By what percent has it gone up in all? =
  26. 26.The price of a bicycle is ₹1880. It goes up by 20%. What is the new price (in ₹)?
  27. 27.A water tank holds 2240 litres. 10% of the water is used. How many litres are left?
  28. 28.The price of a school bag changes from ₹1880 to ₹1316. By what percent did it come down?
  29. 29.The price of a bicycle is ₹1380. It goes up by 15%. What is the new price (in ₹)?
  30. 30.A water tank holds 2520 litres. 20% of the water is used. How many litres are left?
  31. 31.The price of a bicycle is ₹3940. It goes up by 10%. What is the new price (in ₹)?
  32. 32.A town has 100 people. Its population grows by 20%. How many people live there now?
  33. 33.The price of a school bag changes from ₹3080 to ₹2156. By what percent did it come down?
  34. 34.The price of a school bag changes from ₹3260 to ₹4564. By what percent did it go up?
  35. 35.The price of a bicycle is ₹4160. It goes up by 15%. What is the new price (in ₹)?
  36. 36.The price of a bicycle is ₹700. It goes up by 10%. What is the new price (in ₹)?
  37. 37.The price of a school bag changes from ₹4640 to ₹2784. By what percent did it come down?
  38. 38.A water tank holds 280 litres. 10% of the water is used. How many litres are left?
  39. 39.The price of a school bag changes from ₹4180 to ₹2926. By what percent did it come down?
  40. 40.A water tank holds 460 litres. 15% of the water is used. How many litres are left?

Answer key

  1. 1680
  2. 2772
  3. 2068
  4. 1044
  5. 4256
  6. 784
  7. 966
  8. 2
  9. 10
  10. 30
  11. 58
  12. 50
  13. 2112
  14. 12
  15. 57.5
  16. 1455
  17. 50
  18. 40
  19. 5
  20. 10
  21. 4554
  22. 3420
  23. 5910
  24. 40
  25. 69
  26. 2256
  27. 2016
  28. 30
  29. 1587
  30. 2016
  31. 4334
  32. 120
  33. 30
  34. 40
  35. 4784
  36. 770
  37. 40
  38. 252
  39. 30
  40. 391

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