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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 670 · 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 town has 640 people. Its population grows by 10%. How many people live there now?
  2. 2.The price of a school bag changes from ₹240 to ₹204. By what percent did it come down?
  3. 3.The price of a school bag changes from ₹1780 to ₹2047. By what percent did it go up?
  4. 4.A shop sells 4760 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  5. 5.A town has 1780 people. Its population grows by 10%. How many people live there now?
  6. 6.The price of a school bag changes from ₹60 to ₹57. By what percent did it come down?
  7. 7.The price of a school bag changes from ₹4020 to ₹3618. By what percent did it come down?
  8. 8.A price goes up by 40% and then comes down by 15%. By what percent has it gone up in all? =
  9. 9.A water tank holds 660 litres. 15% of the water is used. How many litres are left?
  10. 10.The price of a bicycle is ₹4160. It goes up by 5%. What is the new price (in ₹)?
  11. 11.A price comes down by 10% and then comes down by 10% more. By what percent has it come down in all? =
  12. 12.The price of a bicycle is ₹4980. It goes up by 10%. What is the new price (in ₹)?
  13. 13.A water tank holds 3220 litres. 40% of the water is used. How many litres are left?
  14. 14.A price goes up by 5% and then goes up by 25% more. By what percent has it gone up in all? =
  15. 15.A price goes up by 10% and then goes up by 40% more. By what percent has it gone up in all? =
  16. 16.The price of a bicycle is ₹1640. It goes up by 5%. What is the new price (in ₹)?
  17. 17.The price of a school bag changes from ₹3140 to ₹3297. By what percent did it go up?
  18. 18.The price of a school bag changes from ₹500 to ₹425. By what percent did it come down?
  19. 19.The price of a bicycle is ₹940. It goes up by 15%. What is the new price (in ₹)?
  20. 20.A water tank holds 100 litres. 40% of the water is used. How many litres are left?
  21. 21.A shop sells 3180 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  22. 22.A town has 3920 people. Its population grows by 15%. How many people live there now?
  23. 23.A water tank holds 2200 litres. 5% of the water is used. How many litres are left?
  24. 24.A water tank holds 2600 litres. 40% of the water is used. How many litres are left?
  25. 25.The price of a bicycle is ₹3140. It goes up by 50%. What is the new price (in ₹)?
  26. 26.The price of a bicycle is ₹840. It goes up by 25%. What is the new price (in ₹)?
  27. 27.A town has 1760 people. Its population grows by 20%. How many people live there now?
  28. 28.The price of a bicycle is ₹3180. It goes up by 20%. What is the new price (in ₹)?
  29. 29.A price goes up by 5% and then goes up by 20% more. By what percent has it gone up in all? =
  30. 30.The price of a bicycle is ₹3960. It goes up by 5%. What is the new price (in ₹)?
  31. 31.A price goes up by 50% and then comes down by 15%. By what percent has it gone up in all? =
  32. 32.The price of a bicycle is ₹2100. It goes up by 50%. What is the new price (in ₹)?
  33. 33.The price of a bicycle is ₹4080. It goes up by 30%. What is the new price (in ₹)?
  34. 34.A water tank holds 160 litres. 5% of the water is used. How many litres are left?
  35. 35.A price comes down by 5% and then comes down by 15% more. By what percent has it come down in all? =
  36. 36.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  37. 37.The price of a school bag changes from ₹3760 to ₹4136. By what percent did it go up?
  38. 38.A price goes up by 30% and then comes down by 5%. By what percent has it gone up in all? =
  39. 39.The price of a school bag changes from ₹1320 to ₹1122. By what percent did it come down?
  40. 40.A water tank holds 1140 litres. 50% of the water is used. How many litres are left?

Answer key

  1. 704
  2. 15
  3. 15
  4. 6188
  5. 1958
  6. 5
  7. 10
  8. 19
  9. 561
  10. 4368
  11. 19
  12. 5478
  13. 1932
  14. 31.25
  15. 54
  16. 1722
  17. 5
  18. 15
  19. 1081
  20. 60
  21. 3816
  22. 4508
  23. 2090
  24. 1560
  25. 4710
  26. 1050
  27. 2112
  28. 3816
  29. 26
  30. 4158
  31. 27.5
  32. 3150
  33. 5304
  34. 152
  35. 19.25
  36. 37.5
  37. 10
  38. 23.5
  39. 15
  40. 570

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