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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 504 · 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 1100 litres. 30% of the water is used. How many litres are left?
  2. 2.A water tank holds 1240 litres. 50% of the water is used. How many litres are left?
  3. 3.A shop sells 4440 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  4. 4.A water tank holds 3440 litres. 50% of the water is used. How many litres are left?
  5. 5.A price comes down by 20% and then comes down by 5% more. By what percent has it come down in all? =
  6. 6.A town has 4900 people. Its population grows by 40%. How many people live there now?
  7. 7.The price of a school bag changes from ₹620 to ₹434. By what percent did it come down?
  8. 8.A water tank holds 1100 litres. 20% of the water is used. How many litres are left?
  9. 9.A price goes up by 30% and then comes down by 10%. By what percent has it gone up in all? =
  10. 10.A water tank holds 1960 litres. 20% of the water is used. How many litres are left?
  11. 11.The price of a school bag changes from ₹3140 to ₹1570. By what percent did it come down?
  12. 12.A shop sells 360 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  13. 13.The price of a school bag changes from ₹4960 to ₹6200. By what percent did it go up?
  14. 14.The price of a bicycle is ₹4680. It goes up by 10%. What is the new price (in ₹)?
  15. 15.A water tank holds 2360 litres. 10% of the water is used. How many litres are left?
  16. 16.The price of a school bag changes from ₹2900 to ₹2320. By what percent did it come down?
  17. 17.A water tank holds 540 litres. 25% of the water is used. How many litres are left?
  18. 18.The price of a bicycle is ₹800. It goes up by 30%. What is the new price (in ₹)?
  19. 19.A shop sells 1260 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  20. 20.A water tank holds 2880 litres. 40% of the water is used. How many litres are left?
  21. 21.The price of a school bag changes from ₹260 to ₹195. By what percent did it come down?
  22. 22.A town has 3240 people. Its population grows by 5%. How many people live there now?
  23. 23.The price of a bicycle is ₹4120. It goes up by 50%. What is the new price (in ₹)?
  24. 24.A price goes up by 15% and then goes up by 50% more. By what percent has it gone up in all? =
  25. 25.A price goes up by 20% and then comes down by 5%. By what percent has it gone up in all? =
  26. 26.A water tank holds 4660 litres. 30% of the water is used. How many litres are left?
  27. 27.A price goes up by 30% and then goes up by 40% more. By what percent has it gone up in all? =
  28. 28.The price of a school bag changes from ₹980 to ₹882. By what percent did it come down?
  29. 29.The price of a school bag changes from ₹4760 to ₹7140. By what percent did it go up?
  30. 30.A water tank holds 3980 litres. 10% of the water is used. How many litres are left?
  31. 31.A price comes down by 15% and then comes down by 10% more. By what percent has it come down in all? =
  32. 32.A water tank holds 2140 litres. 15% of the water is used. How many litres are left?
  33. 33.The price of a school bag changes from ₹120 to ₹72. By what percent did it come down?
  34. 34.The price of a school bag changes from ₹300 to ₹375. By what percent did it go up?
  35. 35.A price goes up by 30% and then goes up by 15% more. By what percent has it gone up in all? =
  36. 36.A price goes up by 40% and then goes up by 15% more. By what percent has it gone up in all? =
  37. 37.A water tank holds 880 litres. 15% of the water is used. How many litres are left?
  38. 38.A price goes up by 5% and then goes up by 5% more. By what percent has it gone up in all? =
  39. 39.A shop sells 2800 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  40. 40.A price goes up by 30% and then goes up by 30% more. By what percent has it gone up in all? =

Answer key

  1. 770
  2. 620
  3. 5772
  4. 1720
  5. 24
  6. 6860
  7. 30
  8. 880
  9. 17
  10. 1568
  11. 50
  12. 504
  13. 25
  14. 5148
  15. 2124
  16. 20
  17. 405
  18. 1040
  19. 1890
  20. 1728
  21. 25
  22. 3402
  23. 6180
  24. 72.5
  25. 14
  26. 3262
  27. 82
  28. 10
  29. 50
  30. 3582
  31. 23.5
  32. 1819
  33. 40
  34. 25
  35. 49.5
  36. 61
  37. 748
  38. 10.25
  39. 3920
  40. 69

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