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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 892 · 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 2020 litres. 40% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹1920 to ₹1728. By what percent did it come down?
  3. 3.A town has 4100 people. Its population grows by 25%. How many people live there now?
  4. 4.A water tank holds 4680 litres. 5% of the water is used. How many litres are left?
  5. 5.A shop sells 3060 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  6. 6.The price of a school bag changes from ₹3540 to ₹3363. By what percent did it come down?
  7. 7.A price goes up by 20% and then goes up by 25% more. By what percent has it gone up in all? =
  8. 8.A water tank holds 2960 litres. 40% of the water is used. How many litres are left?
  9. 9.A water tank holds 2040 litres. 25% of the water is used. How many litres are left?
  10. 10.A water tank holds 1960 litres. 10% of the water is used. How many litres are left?
  11. 11.The price of a school bag changes from ₹1360 to ₹1768. By what percent did it go up?
  12. 12.A water tank holds 300 litres. 20% of the water is used. How many litres are left?
  13. 13.A water tank holds 780 litres. 25% of the water is used. How many litres are left?
  14. 14.A town has 560 people. Its population grows by 20%. How many people live there now?
  15. 15.The price of a bicycle is ₹280. It goes up by 50%. What is the new price (in ₹)?
  16. 16.A water tank holds 1120 litres. 40% of the water is used. How many litres are left?
  17. 17.A water tank holds 940 litres. 5% of the water is used. How many litres are left?
  18. 18.A water tank holds 4080 litres. 40% of the water is used. How many litres are left?
  19. 19.The price of a school bag changes from ₹900 to ₹675. By what percent did it come down?
  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 town has 3820 people. Its population grows by 40%. How many people live there now?
  22. 22.A price goes up by 20% and then goes up by 15% more. By what percent has it gone up in all? =
  23. 23.The price of a bicycle is ₹1700. It goes up by 30%. What is the new price (in ₹)?
  24. 24.A water tank holds 5000 litres. 25% of the water is used. How many litres are left?
  25. 25.A price comes down by 15% and then comes down by 15% more. By what percent has it come down in all? =
  26. 26.A price comes down by 30% and then comes down by 25% more. By what percent has it come down in all? =
  27. 27.A price comes down by 40% and then comes down by 40% more. By what percent has it come down in all? =
  28. 28.A price comes down by 40% and then comes down by 50% more. By what percent has it come down in all? =
  29. 29.A price goes up by 50% and then comes down by 25%. By what percent has it gone up in all? =
  30. 30.A water tank holds 4560 litres. 10% of the water is used. How many litres are left?
  31. 31.The price of a school bag changes from ₹2060 to ₹1957. By what percent did it come down?
  32. 32.The price of a school bag changes from ₹1600 to ₹2000. By what percent did it go up?
  33. 33.A water tank holds 3500 litres. 10% of the water is used. How many litres are left?
  34. 34.The price of a school bag changes from ₹4660 to ₹5592. By what percent did it go up?
  35. 35.A water tank holds 2200 litres. 5% of the water is used. How many litres are left?
  36. 36.The price of a school bag changes from ₹1380 to ₹966. By what percent did it come down?
  37. 37.A price comes down by 30% and then comes down by 5% more. By what percent has it come down in all? =
  38. 38.The price of a school bag changes from ₹1720 to ₹1892. By what percent did it go up?
  39. 39.The price of a school bag changes from ₹1240 to ₹1550. By what percent did it go up?
  40. 40.A town has 500 people. Its population grows by 20%. How many people live there now?

Answer key

  1. 1212
  2. 10
  3. 5125
  4. 4446
  5. 3978
  6. 5
  7. 50
  8. 1776
  9. 1530
  10. 1764
  11. 30
  12. 240
  13. 585
  14. 672
  15. 420
  16. 672
  17. 893
  18. 2448
  19. 25
  20. 40.5
  21. 5348
  22. 38
  23. 2210
  24. 3750
  25. 27.75
  26. 47.5
  27. 64
  28. 70
  29. 12.5
  30. 4104
  31. 5
  32. 25
  33. 3150
  34. 20
  35. 2090
  36. 30
  37. 33.5
  38. 10
  39. 25
  40. 600

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