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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 907 · 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 ₹3880 to ₹5820. By what percent did it go up?
  2. 2.A water tank holds 4360 litres. 10% of the water is used. How many litres are left?
  3. 3.A shop sells 300 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  4. 4.The price of a school bag changes from ₹2720 to ₹3400. By what percent did it go up?
  5. 5.The price of a school bag changes from ₹580 to ₹696. By what percent did it go up?
  6. 6.The price of a school bag changes from ₹4300 to ₹2580. By what percent did it come down?
  7. 7.A town has 2260 people. Its population grows by 5%. How many people live there now?
  8. 8.A water tank holds 180 litres. 10% of the water is used. How many litres are left?
  9. 9.A town has 1140 people. Its population grows by 20%. How many people live there now?
  10. 10.The price of a bicycle is ₹4000. It goes up by 10%. What is the new price (in ₹)?
  11. 11.A water tank holds 320 litres. 20% of the water is used. How many litres are left?
  12. 12.A water tank holds 1840 litres. 5% of the water is used. How many litres are left?
  13. 13.The price of a school bag changes from ₹860 to ₹774. By what percent did it come down?
  14. 14.A price goes up by 5% and then goes up by 5% more. By what percent has it gone up in all? =
  15. 15.A price goes up by 15% and then goes up by 5% more. By what percent has it gone up in all? =
  16. 16.The price of a bicycle is ₹3000. It goes up by 40%. What is the new price (in ₹)?
  17. 17.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  18. 18.The price of a bicycle is ₹3640. It goes up by 5%. What is the new price (in ₹)?
  19. 19.The price of a school bag changes from ₹2980 to ₹1788. By what percent did it come down?
  20. 20.The price of a school bag changes from ₹3360 to ₹2016. By what percent did it come down?
  21. 21.The price of a bicycle is ₹1160. It goes up by 5%. What is the new price (in ₹)?
  22. 22.The price of a school bag changes from ₹3940 to ₹2955. By what percent did it come down?
  23. 23.The price of a school bag changes from ₹2420 to ₹2541. By what percent did it go up?
  24. 24.A town has 4900 people. Its population grows by 5%. How many people live there now?
  25. 25.The price of a school bag changes from ₹3000 to ₹2400. By what percent did it come down?
  26. 26.A price comes down by 10% and then comes down by 10% more. By what percent has it come down in all? =
  27. 27.The price of a bicycle is ₹1640. It goes up by 10%. What is the new price (in ₹)?
  28. 28.The price of a school bag changes from ₹780 to ₹897. By what percent did it go up?
  29. 29.A shop sells 660 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  30. 30.A water tank holds 1140 litres. 30% of the water is used. How many litres are left?
  31. 31.A price goes up by 10% and then comes down by 5%. By what percent has it gone up in all? =
  32. 32.The price of a school bag changes from ₹4820 to ₹4097. By what percent did it come down?
  33. 33.A price comes down by 10% and then comes down by 15% more. By what percent has it come down in all? =
  34. 34.The price of a school bag changes from ₹120 to ₹60. By what percent did it come down?
  35. 35.A water tank holds 1400 litres. 20% of the water is used. How many litres are left?
  36. 36.A town has 920 people. Its population grows by 25%. How many people live there now?
  37. 37.The price of a bicycle is ₹3200. It goes up by 5%. What is the new price (in ₹)?
  38. 38.A water tank holds 2960 litres. 40% of the water is used. How many litres are left?
  39. 39.A price goes up by 50% and then comes down by 30%. By what percent has it gone up in all? =
  40. 40.A price goes up by 30% and then comes down by 5%. By what percent has it gone up in all? =

Answer key

  1. 50
  2. 3924
  3. 360
  4. 25
  5. 20
  6. 40
  7. 2373
  8. 162
  9. 1368
  10. 4400
  11. 256
  12. 1748
  13. 10
  14. 10.25
  15. 20.75
  16. 4200
  17. 37.5
  18. 3822
  19. 40
  20. 40
  21. 1218
  22. 25
  23. 5
  24. 5145
  25. 20
  26. 19
  27. 1804
  28. 15
  29. 759
  30. 798
  31. 4.5
  32. 15
  33. 23.5
  34. 50
  35. 1120
  36. 1150
  37. 3360
  38. 1776
  39. 5
  40. 23.5

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