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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 75 · 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 1880 litres. 50% of the water is used. How many litres are left?
  2. 2.A shop sells 2620 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  3. 3.The price of a bicycle is ₹1140. It goes up by 10%. What is the new price (in ₹)?
  4. 4.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =
  5. 5.A price comes down by 10% and then comes down by 40% more. By what percent has it come down in all? =
  6. 6.The price of a bicycle is ₹2960. It goes up by 10%. What is the new price (in ₹)?
  7. 7.The price of a school bag changes from ₹1800 to ₹1980. By what percent did it go up?
  8. 8.A water tank holds 3600 litres. 20% of the water is used. How many litres are left?
  9. 9.A shop sells 320 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  10. 10.A town has 600 people. Its population grows by 5%. How many people live there now?
  11. 11.The price of a bicycle is ₹960. It goes up by 10%. What is the new price (in ₹)?
  12. 12.The price of a bicycle is ₹4320. It goes up by 40%. What is the new price (in ₹)?
  13. 13.A shop sells 4300 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  14. 14.A water tank holds 1940 litres. 15% of the water is used. How many litres are left?
  15. 15.The price of a bicycle is ₹3340. It goes up by 20%. What is the new price (in ₹)?
  16. 16.The price of a bicycle is ₹4980. It goes up by 50%. What is the new price (in ₹)?
  17. 17.A price goes up by 15% and then goes up by 15% more. By what percent has it gone up in all? =
  18. 18.A price comes down by 50% and then comes down by 25% more. By what percent has it come down in all? =
  19. 19.A town has 180 people. Its population grows by 15%. How many people live there now?
  20. 20.The price of a school bag changes from ₹1320 to ₹1188. By what percent did it come down?
  21. 21.A shop sells 2980 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  22. 22.A water tank holds 1100 litres. 20% of the water is used. How many litres are left?
  23. 23.A water tank holds 3500 litres. 5% of the water is used. How many litres are left?
  24. 24.The price of a school bag changes from ₹4440 to ₹2664. By what percent did it come down?
  25. 25.A water tank holds 1060 litres. 5% of the water is used. How many litres are left?
  26. 26.A price comes down by 25% and then comes down by 50% more. By what percent has it come down in all? =
  27. 27.The price of a school bag changes from ₹4040 to ₹5252. By what percent did it go up?
  28. 28.A price comes down by 25% and then comes down by 25% more. By what percent has it come down in all? =
  29. 29.A water tank holds 2780 litres. 40% of the water is used. How many litres are left?
  30. 30.A price goes up by 50% and then comes down by 30%. By what percent has it gone up in all? =
  31. 31.A shop sells 3740 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  32. 32.A price goes up by 5% and then goes up by 5% more. By what percent has it gone up in all? =
  33. 33.A town has 4420 people. Its population grows by 15%. How many people live there now?
  34. 34.A price comes down by 10% and then comes down by 30% more. By what percent has it come down in all? =
  35. 35.The price of a bicycle is ₹1920. It goes up by 15%. What is the new price (in ₹)?
  36. 36.The price of a school bag changes from ₹4300 to ₹2150. By what percent did it come down?
  37. 37.A shop sells 2140 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  38. 38.A town has 440 people. Its population grows by 10%. How many people live there now?
  39. 39.A water tank holds 2960 litres. 40% of the water is used. How many litres are left?
  40. 40.The price of a school bag changes from ₹2300 to ₹3220. By what percent did it go up?

Answer key

  1. 940
  2. 3406
  3. 1254
  4. 15.5
  5. 46
  6. 3256
  7. 10
  8. 2880
  9. 368
  10. 630
  11. 1056
  12. 6048
  13. 5160
  14. 1649
  15. 4008
  16. 7470
  17. 32.25
  18. 62.5
  19. 207
  20. 10
  21. 3576
  22. 880
  23. 3325
  24. 40
  25. 1007
  26. 62.5
  27. 30
  28. 43.75
  29. 1668
  30. 5
  31. 3927
  32. 10.25
  33. 5083
  34. 37
  35. 2208
  36. 50
  37. 2782
  38. 484
  39. 1776
  40. 40

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