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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 982 · 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 shop sells 4760 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  2. 2.The price of a school bag changes from ₹480 to ₹528. By what percent did it go up?
  3. 3.A town has 2800 people. Its population grows by 5%. How many people live there now?
  4. 4.The price of a school bag changes from ₹1280 to ₹960. By what percent did it come down?
  5. 5.A shop sells 4280 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  6. 6.A water tank holds 4580 litres. 15% of the water is used. How many litres are left?
  7. 7.A water tank holds 2600 litres. 30% of the water is used. How many litres are left?
  8. 8.A price comes down by 30% and then comes down by 15% more. By what percent has it come down in all? =
  9. 9.A water tank holds 480 litres. 15% of the water is used. How many litres are left?
  10. 10.A price goes up by 20% and then goes up by 15% more. By what percent has it gone up in all? =
  11. 11.A town has 2520 people. Its population grows by 15%. How many people live there now?
  12. 12.A water tank holds 700 litres. 25% of the water is used. How many litres are left?
  13. 13.The price of a school bag changes from ₹2760 to ₹3174. By what percent did it go up?
  14. 14.A water tank holds 2960 litres. 5% of the water is used. How many litres are left?
  15. 15.A price goes up by 15% and then goes up by 5% more. By what percent has it gone up in all? =
  16. 16.A price comes down by 50% and then comes down by 30% more. By what percent has it come down in all? =
  17. 17.The price of a school bag changes from ₹2140 to ₹2461. By what percent did it go up?
  18. 18.The price of a school bag changes from ₹4320 to ₹3456. By what percent did it come down?
  19. 19.A water tank holds 800 litres. 30% of the water is used. How many litres are left?
  20. 20.The price of a bicycle is ₹760. It goes up by 50%. What is the new price (in ₹)?
  21. 21.A water tank holds 1680 litres. 20% of the water is used. How many litres are left?
  22. 22.A water tank holds 1700 litres. 50% of the water is used. How many litres are left?
  23. 23.The price of a school bag changes from ₹80 to ₹96. By what percent did it go up?
  24. 24.The price of a bicycle is ₹2340. It goes up by 10%. What is the new price (in ₹)?
  25. 25.A water tank holds 3180 litres. 5% of the water is used. How many litres are left?
  26. 26.A price comes down by 30% and then comes down by 20% more. By what percent has it come down in all? =
  27. 27.The price of a school bag changes from ₹180 to ₹207. By what percent did it go up?
  28. 28.A shop sells 3440 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  29. 29.A shop sells 120 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  30. 30.A water tank holds 3960 litres. 15% of the water is used. How many litres are left?
  31. 31.A water tank holds 3360 litres. 50% of the water is used. How many litres are left?
  32. 32.The price of a bicycle is ₹60. It goes up by 25%. What is the new price (in ₹)?
  33. 33.A price goes up by 5% and then goes up by 20% more. By what percent has it gone up in all? =
  34. 34.A water tank holds 2380 litres. 40% of the water is used. How many litres are left?
  35. 35.A water tank holds 660 litres. 25% of the water is used. How many litres are left?
  36. 36.A water tank holds 4440 litres. 40% of the water is used. How many litres are left?
  37. 37.A town has 1000 people. Its population grows by 50%. How many people live there now?
  38. 38.The price of a school bag changes from ₹1800 to ₹900. By what percent did it come down?
  39. 39.The price of a school bag changes from ₹3800 to ₹2850. By what percent did it come down?
  40. 40.A town has 3600 people. Its population grows by 10%. How many people live there now?

Answer key

  1. 7140
  2. 10
  3. 2940
  4. 25
  5. 5136
  6. 3893
  7. 1820
  8. 40.5
  9. 408
  10. 38
  11. 2898
  12. 525
  13. 15
  14. 2812
  15. 20.75
  16. 65
  17. 15
  18. 20
  19. 560
  20. 1140
  21. 1344
  22. 850
  23. 20
  24. 2574
  25. 3021
  26. 44
  27. 15
  28. 4300
  29. 156
  30. 3366
  31. 1680
  32. 75
  33. 26
  34. 1428
  35. 495
  36. 2664
  37. 1500
  38. 50
  39. 25
  40. 3960

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