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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 81 · 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 ₹3600 to ₹2700. By what percent did it come down?
  2. 2.A water tank holds 3840 litres. 5% of the water is used. How many litres are left?
  3. 3.A water tank holds 4820 litres. 15% of the water is used. How many litres are left?
  4. 4.A water tank holds 1980 litres. 50% of the water is used. How many litres are left?
  5. 5.The price of a school bag changes from ₹400 to ₹280. By what percent did it come down?
  6. 6.A water tank holds 360 litres. 25% of the water is used. How many litres are left?
  7. 7.A water tank holds 1140 litres. 5% of the water is used. How many litres are left?
  8. 8.A water tank holds 640 litres. 20% of the water is used. How many litres are left?
  9. 9.A town has 2740 people. Its population grows by 25%. How many people live there now?
  10. 10.The price of a bicycle is ₹860. It goes up by 50%. What is the new price (in ₹)?
  11. 11.A shop sells 4140 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  12. 12.A price comes down by 20% and then comes down by 40% more. By what percent has it come down in all? =
  13. 13.A price goes up by 10% and then comes down by 5%. By what percent has it gone up in all? =
  14. 14.A shop sells 1180 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  15. 15.The price of a school bag changes from ₹4040 to ₹4848. By what percent did it go up?
  16. 16.A town has 960 people. Its population grows by 10%. How many people live there now?
  17. 17.A water tank holds 440 litres. 20% of the water is used. How many litres are left?
  18. 18.The price of a school bag changes from ₹3120 to ₹4056. By what percent did it go up?
  19. 19.A town has 2100 people. Its population grows by 50%. How many people live there now?
  20. 20.A water tank holds 1420 litres. 20% of the water is used. How many litres are left?
  21. 21.A water tank holds 3920 litres. 25% of the water is used. How many litres are left?
  22. 22.The price of a school bag changes from ₹1540 to ₹1925. By what percent did it go up?
  23. 23.The price of a school bag changes from ₹660 to ₹330. By what percent did it come down?
  24. 24.The price of a bicycle is ₹2280. It goes up by 20%. What is the new price (in ₹)?
  25. 25.A price comes down by 25% and then comes down by 25% more. By what percent has it come down in all? =
  26. 26.A price goes up by 40% and then goes up by 10% more. By what percent has it gone up in all? =
  27. 27.A water tank holds 2840 litres. 40% of the water is used. How many litres are left?
  28. 28.A shop sells 1160 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  29. 29.The price of a bicycle is ₹1160. It goes up by 20%. What is the new price (in ₹)?
  30. 30.A town has 180 people. Its population grows by 10%. How many people live there now?
  31. 31.The price of a school bag changes from ₹3960 to ₹4554. By what percent did it go up?
  32. 32.A water tank holds 2800 litres. 10% of the water is used. How many litres are left?
  33. 33.The price of a bicycle is ₹220. It goes up by 15%. What is the new price (in ₹)?
  34. 34.A water tank holds 400 litres. 10% of the water is used. How many litres are left?
  35. 35.The price of a school bag changes from ₹4040 to ₹3030. By what percent did it come down?
  36. 36.A price goes up by 50% and then goes up by 20% more. By what percent has it gone up in all? =
  37. 37.The price of a school bag changes from ₹3180 to ₹3498. By what percent did it go up?
  38. 38.The price of a school bag changes from ₹3600 to ₹4140. By what percent did it go up?
  39. 39.A price comes down by 15% and then comes down by 15% more. By what percent has it come down in all? =
  40. 40.A price goes up by 40% and then goes up by 40% more. By what percent has it gone up in all? =

Answer key

  1. 25
  2. 3648
  3. 4097
  4. 990
  5. 30
  6. 270
  7. 1083
  8. 512
  9. 3425
  10. 1290
  11. 5382
  12. 52
  13. 4.5
  14. 1475
  15. 20
  16. 1056
  17. 352
  18. 30
  19. 3150
  20. 1136
  21. 2940
  22. 25
  23. 50
  24. 2736
  25. 43.75
  26. 54
  27. 1704
  28. 1508
  29. 1392
  30. 198
  31. 15
  32. 2520
  33. 253
  34. 360
  35. 25
  36. 80
  37. 10
  38. 15
  39. 27.75
  40. 96

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