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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 459 · 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 3500 litres. 15% of the water is used. How many litres are left?
  2. 2.A price goes up by 20% and then goes up by 5% more. By what percent has it gone up in all? =
  3. 3.A water tank holds 2880 litres. 20% of the water is used. How many litres are left?
  4. 4.A water tank holds 3960 litres. 5% of the water is used. How many litres are left?
  5. 5.A water tank holds 4540 litres. 40% of the water is used. How many litres are left?
  6. 6.The price of a school bag changes from ₹220 to ₹264. By what percent did it go up?
  7. 7.A price goes up by 5% and then goes up by 10% more. By what percent has it gone up in all? =
  8. 8.A water tank holds 1200 litres. 30% of the water is used. How many litres are left?
  9. 9.A shop sells 4960 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  10. 10.A shop sells 4860 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  11. 11.A price goes up by 20% and then goes up by 15% more. By what percent has it gone up in all? =
  12. 12.The price of a school bag changes from ₹3460 to ₹3633. By what percent did it go up?
  13. 13.A water tank holds 3960 litres. 30% of the water is used. How many litres are left?
  14. 14.A water tank holds 180 litres. 10% of the water is used. How many litres are left?
  15. 15.A price goes up by 30% and then goes up by 25% more. By what percent has it gone up in all? =
  16. 16.A water tank holds 2140 litres. 15% of the water is used. How many litres are left?
  17. 17.The price of a school bag changes from ₹3740 to ₹1870. By what percent did it come down?
  18. 18.The price of a bicycle is ₹4840. It goes up by 15%. What is the new price (in ₹)?
  19. 19.The price of a bicycle is ₹2060. It goes up by 15%. What is the new price (in ₹)?
  20. 20.The price of a school bag changes from ₹4200 to ₹4410. By what percent did it go up?
  21. 21.The price of a school bag changes from ₹4260 to ₹3408. By what percent did it come down?
  22. 22.The price of a school bag changes from ₹580 to ₹725. By what percent did it go up?
  23. 23.The price of a bicycle is ₹1160. It goes up by 5%. What is the new price (in ₹)?
  24. 24.The price of a bicycle is ₹2660. It goes up by 20%. What is the new price (in ₹)?
  25. 25.The price of a bicycle is ₹4600. It goes up by 50%. What is the new price (in ₹)?
  26. 26.The price of a bicycle is ₹660. It goes up by 40%. What is the new price (in ₹)?
  27. 27.The price of a school bag changes from ₹1340 to ₹2010. By what percent did it go up?
  28. 28.The price of a school bag changes from ₹1220 to ₹1830. By what percent did it go up?
  29. 29.A water tank holds 4900 litres. 15% of the water is used. How many litres are left?
  30. 30.A water tank holds 1560 litres. 50% of the water is used. How many litres are left?
  31. 31.The price of a bicycle is ₹4000. It goes up by 40%. What is the new price (in ₹)?
  32. 32.The price of a school bag changes from ₹80 to ₹72. By what percent did it come down?
  33. 33.The price of a school bag changes from ₹1480 to ₹1702. By what percent did it go up?
  34. 34.A water tank holds 360 litres. 25% of the water is used. How many litres are left?
  35. 35.The price of a school bag changes from ₹3180 to ₹3657. By what percent did it go up?
  36. 36.The price of a school bag changes from ₹1160 to ₹1624. By what percent did it go up?
  37. 37.A town has 4120 people. Its population grows by 25%. How many people live there now?
  38. 38.The price of a school bag changes from ₹1160 to ₹986. By what percent did it come down?
  39. 39.A shop sells 60 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  40. 40.A town has 1340 people. Its population grows by 25%. How many people live there now?

Answer key

  1. 2975
  2. 26
  3. 2304
  4. 3762
  5. 2724
  6. 20
  7. 15.5
  8. 840
  9. 6944
  10. 6075
  11. 38
  12. 5
  13. 2772
  14. 162
  15. 62.5
  16. 1819
  17. 50
  18. 5566
  19. 2369
  20. 5
  21. 20
  22. 25
  23. 1218
  24. 3192
  25. 6900
  26. 924
  27. 50
  28. 50
  29. 4165
  30. 780
  31. 5600
  32. 10
  33. 15
  34. 270
  35. 15
  36. 40
  37. 5150
  38. 15
  39. 75
  40. 1675

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