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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 214 · 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 880 litres. 20% of the water is used. How many litres are left?
  2. 2.A price comes down by 25% and then comes down by 25% more. By what percent has it come down in all? =
  3. 3.A water tank holds 1940 litres. 15% of the water is used. How many litres are left?
  4. 4.A water tank holds 3300 litres. 25% of the water is used. How many litres are left?
  5. 5.The price of a bicycle is ₹4320. It goes up by 15%. What is the new price (in ₹)?
  6. 6.A town has 700 people. Its population grows by 40%. How many people live there now?
  7. 7.A water tank holds 4000 litres. 5% of the water is used. How many litres are left?
  8. 8.The price of a bicycle is ₹240. It goes up by 25%. What is the new price (in ₹)?
  9. 9.A price comes down by 25% and then comes down by 5% more. By what percent has it come down in all? =
  10. 10.A water tank holds 600 litres. 10% of the water is used. How many litres are left?
  11. 11.The price of a school bag changes from ₹2620 to ₹2882. By what percent did it go up?
  12. 12.The price of a school bag changes from ₹4760 to ₹4998. By what percent did it go up?
  13. 13.A price comes down by 5% and then comes down by 15% more. By what percent has it come down in all? =
  14. 14.A water tank holds 3540 litres. 50% of the water is used. How many litres are left?
  15. 15.The price of a school bag changes from ₹2740 to ₹3836. By what percent did it go up?
  16. 16.The price of a school bag changes from ₹4860 to ₹5346. By what percent did it go up?
  17. 17.A water tank holds 960 litres. 10% of the water is used. How many litres are left?
  18. 18.A water tank holds 1020 litres. 30% of the water is used. How many litres are left?
  19. 19.A price goes up by 30% and then goes up by 15% more. By what percent has it gone up in all? =
  20. 20.A price goes up by 5% and then goes up by 20% more. By what percent has it gone up in all? =
  21. 21.A price comes down by 10% and then comes down by 25% more. By what percent has it come down in all? =
  22. 22.A price comes down by 50% and then comes down by 40% more. By what percent has it come down in all? =
  23. 23.The price of a school bag changes from ₹1360 to ₹1768. By what percent did it go up?
  24. 24.A price goes up by 5% and then goes up by 15% more. By what percent has it gone up in all? =
  25. 25.A water tank holds 2140 litres. 15% of the water is used. How many litres are left?
  26. 26.A water tank holds 2160 litres. 50% of the water is used. How many litres are left?
  27. 27.A shop sells 1100 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  28. 28.The price of a bicycle is ₹4160. It goes up by 30%. What is the new price (in ₹)?
  29. 29.A water tank holds 880 litres. 50% of the water is used. How many litres are left?
  30. 30.A water tank holds 660 litres. 10% of the water is used. How many litres are left?
  31. 31.A shop sells 4260 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  32. 32.A shop sells 680 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  33. 33.A shop sells 3080 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  34. 34.The price of a school bag changes from ₹3600 to ₹3780. By what percent did it go up?
  35. 35.A water tank holds 3320 litres. 50% of the water is used. How many litres are left?
  36. 36.A shop sells 180 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  37. 37.The price of a school bag changes from ₹4020 to ₹3819. By what percent did it come down?
  38. 38.A price comes down by 30% and then comes down by 10% more. By what percent has it come down in all? =
  39. 39.A water tank holds 2280 litres. 15% of the water is used. How many litres are left?
  40. 40.A price goes up by 10% and then goes up by 50% more. By what percent has it gone up in all? =

Answer key

  1. 704
  2. 43.75
  3. 1649
  4. 2475
  5. 4968
  6. 980
  7. 3800
  8. 300
  9. 28.75
  10. 540
  11. 10
  12. 5
  13. 19.25
  14. 1770
  15. 40
  16. 10
  17. 864
  18. 714
  19. 49.5
  20. 26
  21. 32.5
  22. 70
  23. 30
  24. 20.75
  25. 1819
  26. 1080
  27. 1265
  28. 5408
  29. 440
  30. 594
  31. 6390
  32. 748
  33. 3542
  34. 5
  35. 1660
  36. 198
  37. 5
  38. 37
  39. 1938
  40. 65

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