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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 664 · 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 shop sells 3720 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  2. 2.A price goes up by 50% and then comes down by 10%. By what percent has it gone up in all? =
  3. 3.A water tank holds 400 litres. 25% of the water is used. How many litres are left?
  4. 4.A price goes up by 20% and then goes up by 25% more. By what percent has it gone up in all? =
  5. 5.The price of a school bag changes from ₹4840 to ₹6292. By what percent did it go up?
  6. 6.A water tank holds 3320 litres. 5% of the water is used. How many litres are left?
  7. 7.A town has 660 people. Its population grows by 25%. How many people live there now?
  8. 8.The price of a school bag changes from ₹420 to ₹336. By what percent did it come down?
  9. 9.The price of a school bag changes from ₹1340 to ₹2010. By what percent did it go up?
  10. 10.The price of a bicycle is ₹4980. It goes up by 30%. What is the new price (in ₹)?
  11. 11.The price of a bicycle is ₹2500. It goes up by 15%. What is the new price (in ₹)?
  12. 12.A price comes down by 40% and then comes down by 5% more. By what percent has it come down in all? =
  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.The price of a bicycle is ₹1440. It goes up by 10%. What is the new price (in ₹)?
  15. 15.The price of a school bag changes from ₹4300 to ₹4085. By what percent did it come down?
  16. 16.The price of a school bag changes from ₹3040 to ₹2736. By what percent did it come down?
  17. 17.A town has 360 people. Its population grows by 25%. How many people live there now?
  18. 18.A town has 3340 people. Its population grows by 5%. How many people live there now?
  19. 19.A shop sells 1920 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  20. 20.A water tank holds 1180 litres. 40% of the water is used. How many litres are left?
  21. 21.The price of a school bag changes from ₹4040 to ₹3434. By what percent did it come down?
  22. 22.A price goes up by 20% and then goes up by 40% more. By what percent has it gone up in all? =
  23. 23.The price of a school bag changes from ₹580 to ₹522. By what percent did it come down?
  24. 24.The price of a school bag changes from ₹3760 to ₹1880. By what percent did it come down?
  25. 25.A shop sells 2000 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  26. 26.The price of a bicycle is ₹1080. It goes up by 40%. What is the new price (in ₹)?
  27. 27.A price goes up by 10% and then goes up by 20% more. By what percent has it gone up in all? =
  28. 28.A price goes up by 25% and then goes up by 20% more. By what percent has it gone up in all? =
  29. 29.A water tank holds 2420 litres. 15% of the water is used. How many litres are left?
  30. 30.A water tank holds 480 litres. 20% of the water is used. How many litres are left?
  31. 31.The price of a school bag changes from ₹4820 to ₹6266. By what percent did it go up?
  32. 32.A price goes up by 40% and then goes up by 20% more. By what percent has it gone up in all? =
  33. 33.A price comes down by 20% and then comes down by 15% more. By what percent has it come down in all? =
  34. 34.A price goes up by 15% and then comes down by 5%. By what percent has it gone up in all? =
  35. 35.A price comes down by 40% and then comes down by 50% more. By what percent has it come down in all? =
  36. 36.A water tank holds 4900 litres. 20% of the water is used. How many litres are left?
  37. 37.A price goes up by 25% and then goes up by 50% more. By what percent has it gone up in all? =
  38. 38.A water tank holds 3580 litres. 5% of the water is used. How many litres are left?
  39. 39.A price comes down by 30% and then comes down by 50% more. By what percent has it come down in all? =
  40. 40.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =

Answer key

  1. 4836
  2. 35
  3. 300
  4. 50
  5. 30
  6. 3154
  7. 825
  8. 20
  9. 50
  10. 6474
  11. 2875
  12. 43
  13. 19.25
  14. 1584
  15. 5
  16. 10
  17. 450
  18. 3507
  19. 2016
  20. 708
  21. 15
  22. 68
  23. 10
  24. 50
  25. 3000
  26. 1512
  27. 32
  28. 50
  29. 2057
  30. 384
  31. 30
  32. 68
  33. 32
  34. 9.25
  35. 70
  36. 3920
  37. 87.5
  38. 3401
  39. 65
  40. 21

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