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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 663 · 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 25% and then comes down by 40% more. By what percent has it come down in all? =
  2. 2.A water tank holds 1780 litres. 25% of the water is used. How many litres are left?
  3. 3.The price of a bicycle is ₹4780. It goes up by 5%. What is the new price (in ₹)?
  4. 4.A price comes down by 10% and then comes down by 30% more. By what percent has it come down in all? =
  5. 5.A price goes up by 30% and then goes up by 10% more. By what percent has it gone up in all? =
  6. 6.The price of a school bag changes from ₹4280 to ₹5992. By what percent did it go up?
  7. 7.The price of a school bag changes from ₹920 to ₹460. By what percent did it come down?
  8. 8.The price of a school bag changes from ₹1840 to ₹1656. By what percent did it come down?
  9. 9.A price comes down by 5% and then comes down by 15% more. By what percent has it come down in all? =
  10. 10.The price of a school bag changes from ₹380 to ₹475. By what percent did it go up?
  11. 11.The price of a bicycle is ₹2780. It goes up by 5%. What is the new price (in ₹)?
  12. 12.The price of a school bag changes from ₹500 to ₹700. By what percent did it go up?
  13. 13.A water tank holds 4600 litres. 25% of the water is used. How many litres are left?
  14. 14.A water tank holds 640 litres. 15% of the water is used. How many litres are left?
  15. 15.A price goes up by 25% and then goes up by 25% more. By what percent has it gone up in all? =
  16. 16.The price of a school bag changes from ₹3640 to ₹1820. By what percent did it come down?
  17. 17.A water tank holds 4840 litres. 30% of the water is used. How many litres are left?
  18. 18.A price comes down by 15% and then comes down by 15% more. By what percent has it come down in all? =
  19. 19.A water tank holds 4260 litres. 25% of the water is used. How many litres are left?
  20. 20.A water tank holds 880 litres. 50% of the water is used. How many litres are left?
  21. 21.The price of a school bag changes from ₹500 to ₹400. By what percent did it come down?
  22. 22.A shop sells 1380 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  23. 23.A town has 4920 people. Its population grows by 50%. How many people live there now?
  24. 24.A town has 4140 people. Its population grows by 5%. How many people live there now?
  25. 25.A shop sells 640 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  26. 26.A water tank holds 660 litres. 50% of the water is used. How many litres are left?
  27. 27.A price goes up by 20% and then goes up by 50% more. By what percent has it gone up in all? =
  28. 28.The price of a bicycle is ₹2380. It goes up by 10%. What is the new price (in ₹)?
  29. 29.A price goes up by 40% and then goes up by 5% more. By what percent has it gone up in all? =
  30. 30.The price of a bicycle is ₹4780. It goes up by 25%. What is the new price (in ₹)?
  31. 31.A price goes up by 25% and then comes down by 5%. By what percent has it gone up in all? =
  32. 32.A water tank holds 4580 litres. 30% of the water is used. How many litres are left?
  33. 33.A price goes up by 50% and then comes down by 25%. By what percent has it gone up in all? =
  34. 34.A town has 1240 people. Its population grows by 50%. How many people live there now?
  35. 35.A price comes down by 20% and then comes down by 40% more. By what percent has it come down in all? =
  36. 36.A price comes down by 20% and then comes down by 50% more. By what percent has it come down in all? =
  37. 37.A water tank holds 1120 litres. 10% of the water is used. How many litres are left?
  38. 38.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =
  39. 39.The price of a school bag changes from ₹3200 to ₹4160. By what percent did it go up?
  40. 40.The price of a bicycle is ₹460. It goes up by 15%. What is the new price (in ₹)?

Answer key

  1. 55
  2. 1335
  3. 5019
  4. 37
  5. 43
  6. 40
  7. 50
  8. 10
  9. 19.25
  10. 25
  11. 2919
  12. 40
  13. 3450
  14. 544
  15. 56.25
  16. 50
  17. 3388
  18. 27.75
  19. 3195
  20. 440
  21. 20
  22. 2070
  23. 7380
  24. 4347
  25. 672
  26. 330
  27. 80
  28. 2618
  29. 47
  30. 5975
  31. 18.75
  32. 3206
  33. 12.5
  34. 1860
  35. 52
  36. 60
  37. 1008
  38. 15.5
  39. 30
  40. 529

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