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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 399 · 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 2520 litres. 5% of the water is used. How many litres are left?
  2. 2.A shop sells 980 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  3. 3.The price of a school bag changes from ₹860 to ₹774. By what percent did it come down?
  4. 4.A shop sells 4460 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  5. 5.A water tank holds 3560 litres. 50% of the water is used. How many litres are left?
  6. 6.The price of a school bag changes from ₹1260 to ₹1764. By what percent did it go up?
  7. 7.A water tank holds 2560 litres. 25% of the water is used. How many litres are left?
  8. 8.The price of a school bag changes from ₹1360 to ₹1904. By what percent did it go up?
  9. 9.A town has 2540 people. Its population grows by 15%. How many people live there now?
  10. 10.The price of a school bag changes from ₹4180 to ₹2926. By what percent did it come down?
  11. 11.A town has 3720 people. Its population grows by 10%. How many people live there now?
  12. 12.A water tank holds 3420 litres. 25% of the water is used. How many litres are left?
  13. 13.The price of a bicycle is ₹1040. It goes up by 40%. What is the new price (in ₹)?
  14. 14.A price goes up by 25% and then goes up by 50% more. By what percent has it gone up in all? =
  15. 15.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
  16. 16.A shop sells 2520 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  17. 17.A shop sells 1080 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  18. 18.The price of a bicycle is ₹4180. It goes up by 15%. What is the new price (in ₹)?
  19. 19.A water tank holds 3400 litres. 15% of the water is used. How many litres are left?
  20. 20.A price comes down by 5% and then comes down by 15% more. By what percent has it come down in all? =
  21. 21.A price comes down by 50% and then comes down by 25% more. By what percent has it come down in all? =
  22. 22.The price of a school bag changes from ₹340 to ₹289. By what percent did it come down?
  23. 23.A water tank holds 4200 litres. 50% of the water is used. How many litres are left?
  24. 24.A price goes up by 5% and then goes up by 25% more. By what percent has it gone up in all? =
  25. 25.A town has 4700 people. Its population grows by 50%. How many people live there now?
  26. 26.The price of a school bag changes from ₹2740 to ₹2329. By what percent did it come down?
  27. 27.The price of a school bag changes from ₹1060 to ₹795. By what percent did it come down?
  28. 28.A water tank holds 820 litres. 15% of the water is used. How many litres are left?
  29. 29.The price of a bicycle is ₹4460. It goes up by 25%. What is the new price (in ₹)?
  30. 30.A water tank holds 2460 litres. 20% of the water is used. How many litres are left?
  31. 31.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =
  32. 32.A water tank holds 3860 litres. 5% of the water is used. How many litres are left?
  33. 33.The price of a school bag changes from ₹4320 to ₹4536. By what percent did it go up?
  34. 34.A price comes down by 30% and then comes down by 10% more. By what percent has it come down in all? =
  35. 35.A water tank holds 1780 litres. 5% of the water is used. How many litres are left?
  36. 36.A price goes up by 25% and then goes up by 20% more. By what percent has it gone up in all? =
  37. 37.A shop sells 2640 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  38. 38.A price comes down by 15% and then comes down by 15% more. By what percent has it come down in all? =
  39. 39.A price comes down by 50% and then comes down by 10% more. By what percent has it come down in all? =
  40. 40.A price goes up by 30% and then goes up by 40% more. By what percent has it gone up in all? =

Answer key

  1. 2394
  2. 1470
  3. 10
  4. 6244
  5. 1780
  6. 40
  7. 1920
  8. 40
  9. 2921
  10. 30
  11. 4092
  12. 2565
  13. 1456
  14. 87.5
  15. 9.75
  16. 3528
  17. 1620
  18. 4807
  19. 2890
  20. 19.25
  21. 62.5
  22. 15
  23. 2100
  24. 31.25
  25. 7050
  26. 15
  27. 25
  28. 697
  29. 5575
  30. 1968
  31. 15.5
  32. 3667
  33. 5
  34. 37
  35. 1691
  36. 50
  37. 3696
  38. 27.75
  39. 55
  40. 82

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