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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 305 · 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 price comes down by 30% and then comes down by 40% more. By what percent has it come down in all? =
  2. 2.A price goes up by 20% and then comes down by 10%. By what percent has it gone up in all? =
  3. 3.The price of a school bag changes from ₹1400 to ₹840. By what percent did it come down?
  4. 4.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
  5. 5.A shop sells 560 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  6. 6.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  7. 7.The price of a school bag changes from ₹220 to ₹198. By what percent did it come down?
  8. 8.The price of a school bag changes from ₹4080 to ₹5100. By what percent did it go up?
  9. 9.A water tank holds 160 litres. 15% of the water is used. How many litres are left?
  10. 10.The price of a school bag changes from ₹4300 to ₹4945. By what percent did it go up?
  11. 11.A shop sells 1000 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  12. 12.A water tank holds 1660 litres. 20% of the water is used. How many litres are left?
  13. 13.The price of a school bag changes from ₹460 to ₹529. By what percent did it go up?
  14. 14.A price comes down by 10% and then comes down by 30% more. By what percent has it come down in all? =
  15. 15.The price of a bicycle is ₹2660. It goes up by 5%. What is the new price (in ₹)?
  16. 16.A price comes down by 50% and then comes down by 10% more. By what percent has it come down in all? =
  17. 17.The price of a school bag changes from ₹1060 to ₹636. By what percent did it come down?
  18. 18.A price comes down by 20% and then comes down by 30% more. By what percent has it come down in all? =
  19. 19.A water tank holds 2180 litres. 20% of the water is used. How many litres are left?
  20. 20.A town has 4540 people. Its population grows by 25%. How many people live there now?
  21. 21.A price goes up by 40% and then goes up by 15% more. By what percent has it gone up in all? =
  22. 22.A price goes up by 30% and then comes down by 15%. By what percent has it gone up in all? =
  23. 23.The price of a school bag changes from ₹140 to ₹147. By what percent did it go up?
  24. 24.A price goes up by 30% and then goes up by 25% more. By what percent has it gone up in all? =
  25. 25.A water tank holds 3980 litres. 15% of the water is used. How many litres are left?
  26. 26.A price goes up by 30% and then comes down by 5%. By what percent has it gone up in all? =
  27. 27.A price goes up by 20% and then goes up by 30% more. By what percent has it gone up in all? =
  28. 28.A price goes up by 30% and then goes up by 40% more. By what percent has it gone up in all? =
  29. 29.A shop sells 3640 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  30. 30.The price of a school bag changes from ₹2660 to ₹3458. By what percent did it go up?
  31. 31.A price goes up by 25% and then comes down by 10%. By what percent has it gone up in all? =
  32. 32.A water tank holds 2080 litres. 50% of the water is used. How many litres are left?
  33. 33.A price comes down by 5% and then comes down by 25% more. By what percent has it come down in all? =
  34. 34.A water tank holds 4620 litres. 5% of the water is used. How many litres are left?
  35. 35.The price of a bicycle is ₹3700. It goes up by 5%. What is the new price (in ₹)?
  36. 36.A shop sells 4940 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  37. 37.A price goes up by 50% and then goes up by 25% more. By what percent has it gone up in all? =
  38. 38.A price goes up by 10% and then goes up by 15% more. By what percent has it gone up in all? =
  39. 39.A price goes up by 30% and then goes up by 20% more. By what percent has it gone up in all? =
  40. 40.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =

Answer key

  1. 58
  2. 8
  3. 40
  4. 9.75
  5. 840
  6. 21
  7. 10
  8. 25
  9. 136
  10. 15
  11. 1150
  12. 1328
  13. 15
  14. 37
  15. 2793
  16. 55
  17. 40
  18. 44
  19. 1744
  20. 5675
  21. 61
  22. 10.5
  23. 5
  24. 62.5
  25. 3383
  26. 23.5
  27. 56
  28. 82
  29. 4732
  30. 30
  31. 12.5
  32. 1040
  33. 28.75
  34. 4389
  35. 3885
  36. 7410
  37. 87.5
  38. 26.5
  39. 56
  40. 37.5

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