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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 690 · 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 1060 people. Its population grows by 5%. How many people live there now?
  2. 2.A water tank holds 4440 litres. 25% of the water is used. How many litres are left?
  3. 3.The price of a school bag changes from ₹3760 to ₹4512. By what percent did it go up?
  4. 4.A price comes down by 5% and then comes down by 20% more. By what percent has it come down in all? =
  5. 5.A shop sells 3580 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  6. 6.A price goes up by 5% and then goes up by 5% more. By what percent has it gone up in all? =
  7. 7.A price goes up by 40% and then comes down by 10%. By what percent has it gone up in all? =
  8. 8.A price goes up by 20% and then comes down by 10%. By what percent has it gone up in all? =
  9. 9.The price of a school bag changes from ₹2620 to ₹2751. By what percent did it go up?
  10. 10.The price of a school bag changes from ₹660 to ₹495. By what percent did it come down?
  11. 11.A price comes down by 5% and then comes down by 40% more. By what percent has it come down in all? =
  12. 12.A water tank holds 3880 litres. 10% of the water is used. How many litres are left?
  13. 13.A town has 2380 people. Its population grows by 30%. How many people live there now?
  14. 14.A price goes up by 40% and then comes down by 15%. By what percent has it gone up in all? =
  15. 15.A water tank holds 2360 litres. 20% of the water is used. How many litres are left?
  16. 16.A town has 3320 people. Its population grows by 40%. How many people live there now?
  17. 17.A price comes down by 15% and then comes down by 40% more. By what percent has it come down in all? =
  18. 18.A price goes up by 50% and then goes up by 25% more. By what percent has it gone up in all? =
  19. 19.The price of a bicycle is ₹1040. It goes up by 40%. What is the new price (in ₹)?
  20. 20.A price comes down by 15% and then comes down by 30% more. By what percent has it come down in all? =
  21. 21.A price goes up by 15% and then goes up by 10% more. By what percent has it gone up in all? =
  22. 22.A price comes down by 5% and then comes down by 50% more. By what percent has it come down in all? =
  23. 23.The price of a bicycle is ₹3420. It goes up by 15%. What is the new price (in ₹)?
  24. 24.The price of a bicycle is ₹3180. It goes up by 15%. What is the new price (in ₹)?
  25. 25.The price of a school bag changes from ₹380 to ₹570. By what percent did it go up?
  26. 26.A shop sells 1060 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  27. 27.A water tank holds 4160 litres. 10% of the water is used. How many litres are left?
  28. 28.A water tank holds 1300 litres. 5% of the water is used. How many litres are left?
  29. 29.A shop sells 3480 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  30. 30.A water tank holds 520 litres. 5% of the water is used. How many litres are left?
  31. 31.A shop sells 3760 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  32. 32.The price of a school bag changes from ₹4780 to ₹5019. By what percent did it go up?
  33. 33.A town has 1060 people. Its population grows by 50%. How many people live there now?
  34. 34.A water tank holds 1360 litres. 5% of the water is used. How many litres are left?
  35. 35.A town has 560 people. Its population grows by 40%. How many people live there now?
  36. 36.The price of a school bag changes from ₹2680 to ₹1876. By what percent did it come down?
  37. 37.A price goes up by 40% and then goes up by 25% more. By what percent has it gone up in all? =
  38. 38.A water tank holds 620 litres. 30% of the water is used. How many litres are left?
  39. 39.A price comes down by 10% and then comes down by 10% more. By what percent has it come down in all? =
  40. 40.A water tank holds 2280 litres. 25% of the water is used. How many litres are left?

Answer key

  1. 1113
  2. 3330
  3. 20
  4. 24
  5. 3759
  6. 10.25
  7. 26
  8. 8
  9. 5
  10. 25
  11. 43
  12. 3492
  13. 3094
  14. 19
  15. 1888
  16. 4648
  17. 49
  18. 87.5
  19. 1456
  20. 40.5
  21. 26.5
  22. 52.5
  23. 3933
  24. 3657
  25. 50
  26. 1590
  27. 3744
  28. 1235
  29. 5220
  30. 494
  31. 4512
  32. 5
  33. 1590
  34. 1292
  35. 784
  36. 30
  37. 75
  38. 434
  39. 19
  40. 1710

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