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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 120 · 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 4540 litres. 50% of the water is used. How many litres are left?
  2. 2.The price of a bicycle is ₹1000. It goes up by 15%. What is the new price (in ₹)?
  3. 3.The price of a bicycle is ₹1480. It goes up by 20%. What is the new price (in ₹)?
  4. 4.The price of a school bag changes from ₹1380 to ₹828. By what percent did it come down?
  5. 5.A shop sells 3100 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  6. 6.The price of a school bag changes from ₹1040 to ₹1092. By what percent did it go up?
  7. 7.A price comes down by 15% and then comes down by 50% more. By what percent has it come down in all? =
  8. 8.The price of a school bag changes from ₹1800 to ₹2520. By what percent did it go up?
  9. 9.A water tank holds 4060 litres. 5% of the water is used. How many litres are left?
  10. 10.The price of a school bag changes from ₹1220 to ₹915. By what percent did it come down?
  11. 11.The price of a bicycle is ₹4240. It goes up by 25%. What is the new price (in ₹)?
  12. 12.A price goes up by 40% and then goes up by 50% more. By what percent has it gone up in all? =
  13. 13.The price of a school bag changes from ₹100 to ₹120. By what percent did it go up?
  14. 14.A town has 2320 people. Its population grows by 5%. How many people live there now?
  15. 15.A water tank holds 640 litres. 25% of the water is used. How many litres are left?
  16. 16.A shop sells 2520 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  17. 17.The price of a school bag changes from ₹620 to ₹558. By what percent did it come down?
  18. 18.A water tank holds 1860 litres. 15% of the water is used. How many litres are left?
  19. 19.The price of a school bag changes from ₹740 to ₹851. By what percent did it go up?
  20. 20.A town has 4700 people. Its population grows by 15%. How many people live there now?
  21. 21.The price of a school bag changes from ₹4080 to ₹5304. By what percent did it go up?
  22. 22.A price goes up by 50% and then goes up by 10% more. By what percent has it gone up in all? =
  23. 23.A water tank holds 3540 litres. 25% of the water is used. How many litres are left?
  24. 24.The price of a school bag changes from ₹2160 to ₹1512. By what percent did it come down?
  25. 25.A shop sells 380 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  26. 26.A water tank holds 1080 litres. 25% of the water is used. How many litres are left?
  27. 27.The price of a school bag changes from ₹80 to ₹68. By what percent did it come down?
  28. 28.A water tank holds 3360 litres. 25% of the water is used. How many litres are left?
  29. 29.A shop sells 3720 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  30. 30.A price goes up by 5% and then goes up by 30% more. By what percent has it gone up in all? =
  31. 31.The price of a school bag changes from ₹2440 to ₹3172. By what percent did it go up?
  32. 32.A price comes down by 10% and then comes down by 5% more. By what percent has it come down in all? =
  33. 33.A water tank holds 3000 litres. 30% of the water is used. How many litres are left?
  34. 34.A water tank holds 660 litres. 25% of the water is used. How many litres are left?
  35. 35.A water tank holds 3900 litres. 40% of the water is used. How many litres are left?
  36. 36.The price of a bicycle is ₹1080. It goes up by 25%. What is the new price (in ₹)?
  37. 37.A water tank holds 480 litres. 40% of the water is used. How many litres are left?
  38. 38.The price of a school bag changes from ₹1600 to ₹1200. By what percent did it come down?
  39. 39.The price of a school bag changes from ₹100 to ₹115. By what percent did it go up?
  40. 40.A water tank holds 2620 litres. 5% of the water is used. How many litres are left?

Answer key

  1. 2270
  2. 1150
  3. 1776
  4. 40
  5. 3720
  6. 5
  7. 57.5
  8. 40
  9. 3857
  10. 25
  11. 5300
  12. 110
  13. 20
  14. 2436
  15. 480
  16. 2646
  17. 10
  18. 1581
  19. 15
  20. 5405
  21. 30
  22. 65
  23. 2655
  24. 30
  25. 418
  26. 810
  27. 15
  28. 2520
  29. 4650
  30. 36.5
  31. 30
  32. 14.5
  33. 2100
  34. 495
  35. 2340
  36. 1350
  37. 288
  38. 25
  39. 15
  40. 2489

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