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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 760 · 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.The price of a school bag changes from ₹1520 to ₹1064. By what percent did it come down?
  2. 2.A water tank holds 320 litres. 30% of the water is used. How many litres are left?
  3. 3.A water tank holds 780 litres. 25% of the water is used. How many litres are left?
  4. 4.A town has 3080 people. Its population grows by 5%. How many people live there now?
  5. 5.The price of a school bag changes from ₹800 to ₹920. By what percent did it go up?
  6. 6.A town has 900 people. Its population grows by 5%. How many people live there now?
  7. 7.The price of a school bag changes from ₹4700 to ₹4465. By what percent did it come down?
  8. 8.A water tank holds 4080 litres. 25% of the water is used. How many litres are left?
  9. 9.A price goes up by 10% and then goes up by 15% more. By what percent has it gone up in all? =
  10. 10.The price of a bicycle is ₹1780. It goes up by 15%. What is the new price (in ₹)?
  11. 11.A price comes down by 30% and then comes down by 40% more. By what percent has it come down in all? =
  12. 12.The price of a bicycle is ₹1080. It goes up by 20%. What is the new price (in ₹)?
  13. 13.A price goes up by 30% and then goes up by 30% more. By what percent has it gone up in all? =
  14. 14.A water tank holds 2100 litres. 5% of the water is used. How many litres are left?
  15. 15.A water tank holds 4580 litres. 5% of the water is used. How many litres are left?
  16. 16.A price goes up by 20% and then goes up by 5% more. By what percent has it gone up in all? =
  17. 17.A price goes up by 15% and then goes up by 5% more. By what percent has it gone up in all? =
  18. 18.A town has 4180 people. Its population grows by 5%. How many people live there now?
  19. 19.A price goes up by 10% and then comes down by 5%. By what percent has it gone up in all? =
  20. 20.The price of a school bag changes from ₹4400 to ₹5060. By what percent did it go up?
  21. 21.The price of a school bag changes from ₹3700 to ₹2775. By what percent did it come down?
  22. 22.A town has 2920 people. Its population grows by 5%. How many people live there now?
  23. 23.The price of a bicycle is ₹3240. It goes up by 50%. What is the new price (in ₹)?
  24. 24.A shop sells 2600 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  25. 25.The price of a school bag changes from ₹4980 to ₹3486. By what percent did it come down?
  26. 26.A price comes down by 20% and then comes down by 10% more. By what percent has it come down in all? =
  27. 27.A price comes down by 25% and then comes down by 15% more. By what percent has it come down in all? =
  28. 28.A water tank holds 3000 litres. 5% of the water is used. How many litres are left?
  29. 29.A price comes down by 10% and then comes down by 30% more. By what percent has it come down in all? =
  30. 30.The price of a bicycle is ₹1180. It goes up by 50%. What is the new price (in ₹)?
  31. 31.The price of a school bag changes from ₹1120 to ₹1680. By what percent did it go up?
  32. 32.The price of a school bag changes from ₹4440 to ₹5106. By what percent did it go up?
  33. 33.A town has 3180 people. Its population grows by 5%. How many people live there now?
  34. 34.A shop sells 2200 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  35. 35.A town has 4640 people. Its population grows by 50%. How many people live there now?
  36. 36.The price of a school bag changes from ₹4920 to ₹5658. By what percent did it go up?
  37. 37.A price goes up by 40% and then goes up by 50% more. By what percent has it gone up in all? =
  38. 38.A price goes up by 20% and then goes up by 30% more. By what percent has it gone up in all? =
  39. 39.The price of a school bag changes from ₹3660 to ₹2562. By what percent did it come down?
  40. 40.A water tank holds 2440 litres. 15% of the water is used. How many litres are left?

Answer key

  1. 30
  2. 224
  3. 585
  4. 3234
  5. 15
  6. 945
  7. 5
  8. 3060
  9. 26.5
  10. 2047
  11. 58
  12. 1296
  13. 69
  14. 1995
  15. 4351
  16. 26
  17. 20.75
  18. 4389
  19. 4.5
  20. 15
  21. 25
  22. 3066
  23. 4860
  24. 2990
  25. 30
  26. 28
  27. 36.25
  28. 2850
  29. 37
  30. 1770
  31. 50
  32. 15
  33. 3339
  34. 2310
  35. 6960
  36. 15
  37. 110
  38. 56
  39. 30
  40. 2074

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