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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 413 · 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 water tank holds 3600 litres. 5% of the water is used. How many litres are left?
  2. 2.A water tank holds 840 litres. 30% of the water is used. How many litres are left?
  3. 3.A town has 4660 people. Its population grows by 20%. How many people live there now?
  4. 4.A price comes down by 40% and then comes down by 20% more. By what percent has it come down in all? =
  5. 5.The price of a school bag changes from ₹4700 to ₹2350. By what percent did it come down?
  6. 6.A water tank holds 1440 litres. 20% of the water is used. How many litres are left?
  7. 7.A price goes up by 5% and then goes up by 20% more. By what percent has it gone up in all? =
  8. 8.The price of a school bag changes from ₹1880 to ₹1598. By what percent did it come down?
  9. 9.The price of a bicycle is ₹660. It goes up by 20%. What is the new price (in ₹)?
  10. 10.A water tank holds 1500 litres. 10% of the water is used. How many litres are left?
  11. 11.The price of a school bag changes from ₹3700 to ₹4255. By what percent did it go up?
  12. 12.A water tank holds 220 litres. 25% of the water is used. How many litres are left?
  13. 13.The price of a school bag changes from ₹4000 to ₹2400. By what percent did it come down?
  14. 14.A price comes down by 20% and then comes down by 40% more. By what percent has it come down in all? =
  15. 15.A shop sells 1320 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  16. 16.A price goes up by 40% and then goes up by 30% more. By what percent has it gone up in all? =
  17. 17.The price of a bicycle is ₹4160. It goes up by 5%. What is the new price (in ₹)?
  18. 18.A shop sells 4060 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  19. 19.A price goes up by 40% and then goes up by 15% more. By what percent has it gone up in all? =
  20. 20.A water tank holds 4080 litres. 25% of the water is used. How many litres are left?
  21. 21.The price of a school bag changes from ₹5000 to ₹3500. By what percent did it come down?
  22. 22.A price goes up by 5% 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 ₹640 to ₹608. By what percent did it come down?
  24. 24.The price of a school bag changes from ₹4100 to ₹5740. By what percent did it go up?
  25. 25.The price of a bicycle is ₹4600. It goes up by 15%. What is the new price (in ₹)?
  26. 26.A price goes up by 20% and then comes down by 5%. By what percent has it gone up in all? =
  27. 27.The price of a bicycle is ₹260. It goes up by 50%. What is the new price (in ₹)?
  28. 28.A town has 3000 people. Its population grows by 10%. How many people live there now?
  29. 29.A town has 1240 people. Its population grows by 20%. How many people live there now?
  30. 30.The price of a school bag changes from ₹2880 to ₹2448. By what percent did it come down?
  31. 31.A water tank holds 820 litres. 15% of the water is used. How many litres are left?
  32. 32.A shop sells 3080 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  33. 33.The price of a bicycle is ₹300. It goes up by 30%. What is the new price (in ₹)?
  34. 34.A water tank holds 4880 litres. 50% of the water is used. How many litres are left?
  35. 35.The price of a bicycle is ₹2580. It goes up by 25%. What is the new price (in ₹)?
  36. 36.A water tank holds 1580 litres. 15% of the water is used. How many litres are left?
  37. 37.A water tank holds 2220 litres. 25% of the water is used. How many litres are left?
  38. 38.A water tank holds 2520 litres. 10% of the water is used. How many litres are left?
  39. 39.The price of a school bag changes from ₹1600 to ₹2000. By what percent did it go up?
  40. 40.A price goes up by 30% and then comes down by 10%. By what percent has it gone up in all? =

Answer key

  1. 3420
  2. 588
  3. 5592
  4. 52
  5. 50
  6. 1152
  7. 26
  8. 15
  9. 792
  10. 1350
  11. 15
  12. 165
  13. 40
  14. 52
  15. 1452
  16. 82
  17. 4368
  18. 5075
  19. 61
  20. 3060
  21. 30
  22. 47
  23. 5
  24. 40
  25. 5290
  26. 14
  27. 390
  28. 3300
  29. 1488
  30. 15
  31. 697
  32. 3388
  33. 390
  34. 2440
  35. 3225
  36. 1343
  37. 1665
  38. 2268
  39. 25
  40. 17

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