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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 263 · 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 2980 litres. 25% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹940 to ₹1081. By what percent did it go up?
  3. 3.A water tank holds 820 litres. 25% of the water is used. How many litres are left?
  4. 4.A water tank holds 3480 litres. 10% of the water is used. How many litres are left?
  5. 5.A water tank holds 4800 litres. 5% of the water is used. How many litres are left?
  6. 6.A water tank holds 2360 litres. 40% of the water is used. How many litres are left?
  7. 7.A water tank holds 2460 litres. 15% of the water is used. How many litres are left?
  8. 8.A shop sells 1660 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  9. 9.A price comes down by 15% and then comes down by 25% more. By what percent has it come down in all? =
  10. 10.A price goes up by 25% and then goes up by 40% more. By what percent has it gone up in all? =
  11. 11.A water tank holds 4180 litres. 15% of the water is used. How many litres are left?
  12. 12.A town has 4940 people. Its population grows by 5%. How many people live there now?
  13. 13.A town has 3640 people. Its population grows by 10%. How many people live there now?
  14. 14.A price comes down by 40% and then comes down by 10% more. By what percent has it come down in all? =
  15. 15.A price comes down by 5% and then comes down by 50% more. By what percent has it come down in all? =
  16. 16.A price goes up by 20% and then comes down by 5%. By what percent has it gone up in all? =
  17. 17.A water tank holds 3100 litres. 20% of the water is used. How many litres are left?
  18. 18.The price of a bicycle is ₹1740. It goes up by 15%. What is the new price (in ₹)?
  19. 19.A price goes up by 50% and then goes up by 10% more. By what percent has it gone up in all? =
  20. 20.The price of a bicycle is ₹4160. It goes up by 15%. What is the new price (in ₹)?
  21. 21.The price of a bicycle is ₹1880. It goes up by 10%. What is the new price (in ₹)?
  22. 22.A water tank holds 3700 litres. 30% of the water is used. How many litres are left?
  23. 23.The price of a bicycle is ₹640. It goes up by 30%. What is the new price (in ₹)?
  24. 24.A price goes up by 50% and then comes down by 25%. By what percent has it gone up in all? =
  25. 25.A water tank holds 980 litres. 20% of the water is used. How many litres are left?
  26. 26.A shop sells 4700 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  27. 27.A price comes down by 20% and then comes down by 25% more. By what percent has it come down in all? =
  28. 28.A price comes down by 50% and then comes down by 20% more. By what percent has it come down in all? =
  29. 29.A town has 3380 people. Its population grows by 5%. How many people live there now?
  30. 30.A water tank holds 2440 litres. 25% of the water is used. How many litres are left?
  31. 31.The price of a school bag changes from ₹1760 to ₹2640. By what percent did it go up?
  32. 32.The price of a school bag changes from ₹1700 to ₹1955. By what percent did it go up?
  33. 33.The price of a school bag changes from ₹2300 to ₹1610. By what percent did it come down?
  34. 34.A town has 120 people. Its population grows by 15%. How many people live there now?
  35. 35.A water tank holds 120 litres. 5% of the water is used. How many litres are left?
  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 town has 1060 people. Its population grows by 40%. How many people live there now?
  38. 38.The price of a school bag changes from ₹380 to ₹228. By what percent did it come down?
  39. 39.The price of a school bag changes from ₹1860 to ₹1116. By what percent did it come down?
  40. 40.A water tank holds 580 litres. 25% of the water is used. How many litres are left?

Answer key

  1. 2235
  2. 15
  3. 615
  4. 3132
  5. 4560
  6. 1416
  7. 2091
  8. 1826
  9. 36.25
  10. 75
  11. 3553
  12. 5187
  13. 4004
  14. 46
  15. 52.5
  16. 14
  17. 2480
  18. 2001
  19. 65
  20. 4784
  21. 2068
  22. 2590
  23. 832
  24. 12.5
  25. 784
  26. 5405
  27. 40
  28. 60
  29. 3549
  30. 1830
  31. 50
  32. 15
  33. 30
  34. 138
  35. 114
  36. 61
  37. 1484
  38. 40
  39. 40
  40. 435

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