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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 882 · 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 2600 litres. 20% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹1120 to ₹1176. By what percent did it go up?
  3. 3.The price of a school bag changes from ₹4760 to ₹6664. By what percent did it go up?
  4. 4.A price goes up by 5% and then goes up by 50% more. By what percent has it gone up in all? =
  5. 5.A price goes up by 30% and then comes down by 10%. By what percent has it gone up in all? =
  6. 6.A shop sells 780 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  7. 7.A town has 3820 people. Its population grows by 15%. How many people live there now?
  8. 8.A water tank holds 4620 litres. 50% of the water is used. How many litres are left?
  9. 9.A town has 180 people. Its population grows by 10%. How many people live there now?
  10. 10.A price goes up by 50% and then goes up by 20% more. By what percent has it gone up in all? =
  11. 11.The price of a school bag changes from ₹840 to ₹1050. By what percent did it go up?
  12. 12.A water tank holds 440 litres. 25% of the water is used. How many litres are left?
  13. 13.The price of a bicycle is ₹3240. It goes up by 20%. What is the new price (in ₹)?
  14. 14.The price of a school bag changes from ₹2700 to ₹4050. By what percent did it go up?
  15. 15.A price goes up by 30% and then goes up by 10% more. By what percent has it gone up in all? =
  16. 16.A shop sells 4680 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  17. 17.A price goes up by 50% and then comes down by 25%. By what percent has it gone up in all? =
  18. 18.The price of a school bag changes from ₹4600 to ₹4830. By what percent did it go up?
  19. 19.A water tank holds 4260 litres. 25% of the water is used. How many litres are left?
  20. 20.A price goes up by 50% and then comes down by 10%. By what percent has it gone up in all? =
  21. 21.The price of a school bag changes from ₹4600 to ₹3450. By what percent did it come down?
  22. 22.The price of a bicycle is ₹2560. It goes up by 15%. What is the new price (in ₹)?
  23. 23.A price comes down by 40% and then comes down by 30% more. By what percent has it come down in all? =
  24. 24.A price goes up by 50% and then comes down by 5%. By what percent has it gone up in all? =
  25. 25.A price goes up by 50% and then comes down by 30%. By what percent has it gone up in all? =
  26. 26.The price of a bicycle is ₹3240. It goes up by 15%. What is the new price (in ₹)?
  27. 27.A town has 3560 people. Its population grows by 25%. How many people live there now?
  28. 28.A water tank holds 3300 litres. 25% of the water is used. How many litres are left?
  29. 29.The price of a bicycle is ₹3660. It goes up by 5%. What is the new price (in ₹)?
  30. 30.A town has 1100 people. Its population grows by 10%. How many people live there now?
  31. 31.A water tank holds 1700 litres. 30% of the water is used. How many litres are left?
  32. 32.A water tank holds 3500 litres. 50% of the water is used. How many litres are left?
  33. 33.The price of a bicycle is ₹160. It goes up by 20%. What is the new price (in ₹)?
  34. 34.The price of a bicycle is ₹4860. It goes up by 5%. What is the new price (in ₹)?
  35. 35.A water tank holds 3980 litres. 10% of the water is used. How many litres are left?
  36. 36.The price of a school bag changes from ₹3080 to ₹1848. By what percent did it come down?
  37. 37.A shop sells 1620 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  38. 38.A price goes up by 5% and then goes up by 10% more. By what percent has it gone up in all? =
  39. 39.The price of a bicycle is ₹3220. It goes up by 20%. What is the new price (in ₹)?
  40. 40.The price of a bicycle is ₹1580. It goes up by 50%. What is the new price (in ₹)?

Answer key

  1. 2080
  2. 5
  3. 40
  4. 57.5
  5. 17
  6. 1014
  7. 4393
  8. 2310
  9. 198
  10. 80
  11. 25
  12. 330
  13. 3888
  14. 50
  15. 43
  16. 5850
  17. 12.5
  18. 5
  19. 3195
  20. 35
  21. 25
  22. 2944
  23. 58
  24. 42.5
  25. 5
  26. 3726
  27. 4450
  28. 2475
  29. 3843
  30. 1210
  31. 1190
  32. 1750
  33. 192
  34. 5103
  35. 3582
  36. 40
  37. 1782
  38. 15.5
  39. 3864
  40. 2370

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