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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 581 · 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 400 litres. 15% of the water is used. How many litres are left?
  2. 2.A water tank holds 1240 litres. 5% of the water is used. How many litres are left?
  3. 3.A price goes up by 20% and then comes down by 10%. By what percent has it gone up in all? =
  4. 4.The price of a school bag changes from ₹260 to ₹156. By what percent did it come down?
  5. 5.A town has 3920 people. Its population grows by 10%. How many people live there now?
  6. 6.A price goes up by 25% and then goes up by 20% more. By what percent has it gone up in all? =
  7. 7.A town has 160 people. Its population grows by 15%. How many people live there now?
  8. 8.A water tank holds 3440 litres. 20% of the water is used. How many litres are left?
  9. 9.A price comes down by 25% and then comes down by 15% more. By what percent has it come down in all? =
  10. 10.The price of a school bag changes from ₹2120 to ₹1590. By what percent did it come down?
  11. 11.The price of a bicycle is ₹3840. It goes up by 10%. What is the new price (in ₹)?
  12. 12.A water tank holds 2820 litres. 5% of the water is used. How many litres are left?
  13. 13.The price of a school bag changes from ₹1980 to ₹2277. By what percent did it go up?
  14. 14.A shop sells 1360 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  15. 15.The price of a school bag changes from ₹2580 to ₹1935. By what percent did it come down?
  16. 16.The price of a school bag changes from ₹4600 to ₹5520. By what percent did it go up?
  17. 17.The price of a bicycle is ₹2860. It goes up by 10%. What is the new price (in ₹)?
  18. 18.A shop sells 120 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  19. 19.The price of a bicycle is ₹2980. It goes up by 40%. What is the new price (in ₹)?
  20. 20.A price goes up by 50% and then goes up by 30% more. By what percent has it gone up in all? =
  21. 21.The price of a school bag changes from ₹3560 to ₹3738. By what percent did it go up?
  22. 22.A price goes up by 50% and then comes down by 10%. By what percent has it gone up in all? =
  23. 23.A price comes down by 50% and then comes down by 30% more. By what percent has it come down in all? =
  24. 24.A water tank holds 1120 litres. 50% of the water is used. How many litres are left?
  25. 25.A water tank holds 4740 litres. 50% of the water is used. How many litres are left?
  26. 26.The price of a school bag changes from ₹1480 to ₹1924. By what percent did it go up?
  27. 27.A water tank holds 880 litres. 10% of the water is used. How many litres are left?
  28. 28.A water tank holds 1340 litres. 25% of the water is used. How many litres are left?
  29. 29.The price of a school bag changes from ₹2060 to ₹1751. By what percent did it come down?
  30. 30.The price of a school bag changes from ₹4680 to ₹2808. By what percent did it come down?
  31. 31.A shop sells 4860 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  32. 32.The price of a school bag changes from ₹180 to ₹135. By what percent did it come down?
  33. 33.The price of a school bag changes from ₹2800 to ₹2240. By what percent did it come down?
  34. 34.The price of a school bag changes from ₹2240 to ₹2464. By what percent did it go up?
  35. 35.The price of a school bag changes from ₹3220 to ₹3381. By what percent did it go up?
  36. 36.A shop sells 200 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  37. 37.The price of a school bag changes from ₹1320 to ₹1188. By what percent did it come down?
  38. 38.A shop sells 920 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  39. 39.A price goes up by 10% and then goes up by 30% more. By what percent has it gone up in all? =
  40. 40.A water tank holds 1460 litres. 10% of the water is used. How many litres are left?

Answer key

  1. 340
  2. 1178
  3. 8
  4. 40
  5. 4312
  6. 50
  7. 184
  8. 2752
  9. 36.25
  10. 25
  11. 4224
  12. 2679
  13. 15
  14. 1632
  15. 25
  16. 20
  17. 3146
  18. 138
  19. 4172
  20. 95
  21. 5
  22. 35
  23. 65
  24. 560
  25. 2370
  26. 30
  27. 792
  28. 1005
  29. 15
  30. 40
  31. 5103
  32. 25
  33. 20
  34. 10
  35. 5
  36. 240
  37. 10
  38. 1150
  39. 43
  40. 1314

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