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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 125 · 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 goes up by 50% and then goes up by 20% more. By what percent has it gone up in all? =
  2. 2.The price of a school bag changes from ₹2580 to ₹3225. By what percent did it go up?
  3. 3.A town has 4800 people. Its population grows by 40%. How many people live there now?
  4. 4.A water tank holds 3700 litres. 5% of the water is used. How many litres are left?
  5. 5.The price of a school bag changes from ₹4800 to ₹5280. By what percent did it go up?
  6. 6.A price comes down by 15% and then comes down by 20% more. By what percent has it come down in all? =
  7. 7.A town has 2720 people. Its population grows by 40%. How many people live there now?
  8. 8.A water tank holds 2240 litres. 50% of the water is used. How many litres are left?
  9. 9.A price comes down by 30% and then comes down by 10% more. By what percent has it come down in all? =
  10. 10.A water tank holds 1440 litres. 5% of the water is used. How many litres are left?
  11. 11.The price of a school bag changes from ₹1600 to ₹1680. By what percent did it go up?
  12. 12.A water tank holds 4760 litres. 15% of the water is used. How many litres are left?
  13. 13.A price comes down by 10% and then comes down by 10% more. By what percent has it come down in all? =
  14. 14.The price of a school bag changes from ₹1940 to ₹2522. By what percent did it go up?
  15. 15.The price of a school bag changes from ₹200 to ₹140. By what percent did it come down?
  16. 16.A town has 780 people. Its population grows by 10%. How many people live there now?
  17. 17.A water tank holds 640 litres. 30% of the water is used. How many litres are left?
  18. 18.The price of a bicycle is ₹260. It goes up by 25%. What is the new price (in ₹)?
  19. 19.A price comes down by 15% and then comes down by 30% more. By what percent has it come down in all? =
  20. 20.A water tank holds 1720 litres. 30% of the water is used. How many litres are left?
  21. 21.A water tank holds 1200 litres. 5% of the water is used. How many litres are left?
  22. 22.A price comes down by 50% and then comes down by 10% more. By what percent has it come down in all? =
  23. 23.A town has 740 people. Its population grows by 30%. How many people live there now?
  24. 24.A water tank holds 3540 litres. 30% of the water is used. How many litres are left?
  25. 25.A price comes down by 30% and then comes down by 25% more. By what percent has it come down in all? =
  26. 26.A price goes up by 15% and then goes up by 30% more. By what percent has it gone up in all? =
  27. 27.A price goes up by 40% and then goes up by 15% more. By what percent has it gone up in all? =
  28. 28.A price goes up by 50% and then goes up by 5% more. By what percent has it gone up in all? =
  29. 29.The price of a bicycle is ₹2380. It goes up by 25%. What is the new price (in ₹)?
  30. 30.A water tank holds 3900 litres. 40% of the water is used. How many litres are left?
  31. 31.A water tank holds 1540 litres. 25% of the water is used. How many litres are left?
  32. 32.The price of a bicycle is ₹300. It goes up by 30%. What is the new price (in ₹)?
  33. 33.The price of a school bag changes from ₹1480 to ₹1036. By what percent did it come down?
  34. 34.A price goes up by 15% and then goes up by 10% more. By what percent has it gone up in all? =
  35. 35.The price of a school bag changes from ₹320 to ₹256. By what percent did it come down?
  36. 36.A town has 3540 people. Its population grows by 50%. How many people live there now?
  37. 37.A water tank holds 2780 litres. 40% of the water is used. How many litres are left?
  38. 38.A water tank holds 1960 litres. 10% of the water is used. How many litres are left?
  39. 39.A shop sells 4600 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  40. 40.The price of a school bag changes from ₹1760 to ₹1320. By what percent did it come down?

Answer key

  1. 80
  2. 25
  3. 6720
  4. 3515
  5. 10
  6. 32
  7. 3808
  8. 1120
  9. 37
  10. 1368
  11. 5
  12. 4046
  13. 19
  14. 30
  15. 30
  16. 858
  17. 448
  18. 325
  19. 40.5
  20. 1204
  21. 1140
  22. 55
  23. 962
  24. 2478
  25. 47.5
  26. 49.5
  27. 61
  28. 57.5
  29. 2975
  30. 2340
  31. 1155
  32. 390
  33. 30
  34. 26.5
  35. 20
  36. 5310
  37. 1668
  38. 1764
  39. 5290
  40. 25

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