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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 355 · 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 price comes down by 30% and then comes down by 40% more. By what percent has it come down in all? =
  2. 2.The price of a school bag changes from ₹480 to ₹360. By what percent did it come down?
  3. 3.A water tank holds 2660 litres. 5% of the water is used. How many litres are left?
  4. 4.A water tank holds 3980 litres. 15% of the water is used. How many litres are left?
  5. 5.The price of a school bag changes from ₹100 to ₹60. By what percent did it come down?
  6. 6.A water tank holds 4380 litres. 25% of the water is used. How many litres are left?
  7. 7.A town has 4700 people. Its population grows by 5%. How many people live there now?
  8. 8.A shop sells 3920 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  9. 9.The price of a school bag changes from ₹380 to ₹399. By what percent did it go up?
  10. 10.A water tank holds 1700 litres. 40% of the water is used. How many litres are left?
  11. 11.A town has 4300 people. Its population grows by 15%. How many people live there now?
  12. 12.The price of a school bag changes from ₹420 to ₹399. By what percent did it come down?
  13. 13.A water tank holds 220 litres. 15% of the water is used. How many litres are left?
  14. 14.A shop sells 3560 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  15. 15.The price of a school bag changes from ₹3060 to ₹2907. By what percent did it come down?
  16. 16.The price of a school bag changes from ₹3000 to ₹3600. By what percent did it go up?
  17. 17.The price of a school bag changes from ₹1160 to ₹986. By what percent did it come down?
  18. 18.A water tank holds 2180 litres. 25% of the water is used. How many litres are left?
  19. 19.A water tank holds 560 litres. 5% of the water is used. How many litres are left?
  20. 20.A shop sells 760 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  21. 21.A town has 3300 people. Its population grows by 10%. How many people live there now?
  22. 22.The price of a school bag changes from ₹740 to ₹1110. By what percent did it go up?
  23. 23.The price of a school bag changes from ₹1380 to ₹1794. By what percent did it go up?
  24. 24.A shop sells 4100 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  25. 25.A water tank holds 4840 litres. 10% of the water is used. How many litres are left?
  26. 26.The price of a school bag changes from ₹4120 to ₹3090. By what percent did it come down?
  27. 27.The price of a school bag changes from ₹3040 to ₹3648. By what percent did it go up?
  28. 28.A price comes down by 10% and then comes down by 40% more. By what percent has it come down in all? =
  29. 29.A price goes up by 40% and then goes up by 10% more. By what percent has it gone up in all? =
  30. 30.A price goes up by 10% and then goes up by 50% more. By what percent has it gone up in all? =
  31. 31.The price of a school bag changes from ₹3320 to ₹3154. By what percent did it come down?
  32. 32.A price goes up by 15% and then goes up by 20% more. By what percent has it gone up in all? =
  33. 33.The price of a bicycle is ₹1100. It goes up by 20%. What is the new price (in ₹)?
  34. 34.The price of a school bag changes from ₹3880 to ₹4074. By what percent did it go up?
  35. 35.A shop sells 1500 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  36. 36.A price goes up by 30% and then goes up by 10% more. By what percent has it gone up in all? =
  37. 37.A water tank holds 2600 litres. 5% of the water is used. How many litres are left?
  38. 38.The price of a school bag changes from ₹1780 to ₹2492. By what percent did it go up?
  39. 39.A water tank holds 1300 litres. 30% of the water is used. How many litres are left?
  40. 40.A water tank holds 1980 litres. 30% of the water is used. How many litres are left?

Answer key

  1. 58
  2. 25
  3. 2527
  4. 3383
  5. 40
  6. 3285
  7. 4935
  8. 5880
  9. 5
  10. 1020
  11. 4945
  12. 5
  13. 187
  14. 4628
  15. 5
  16. 20
  17. 15
  18. 1635
  19. 532
  20. 1064
  21. 3630
  22. 50
  23. 30
  24. 5740
  25. 4356
  26. 25
  27. 20
  28. 46
  29. 54
  30. 65
  31. 5
  32. 38
  33. 1320
  34. 5
  35. 2100
  36. 43
  37. 2470
  38. 40
  39. 910
  40. 1386

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