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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 816 · 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 goes up by 25% and then goes up by 20% more. By what percent has it gone up in all? =
  2. 2.A water tank holds 1240 litres. 50% of the water is used. How many litres are left?
  3. 3.A price comes down by 40% and then comes down by 25% more. By what percent has it come down in all? =
  4. 4.A water tank holds 2520 litres. 50% of the water is used. How many litres are left?
  5. 5.The price of a bicycle is ₹4640. It goes up by 50%. What is the new price (in ₹)?
  6. 6.A water tank holds 3760 litres. 50% of the water is used. How many litres are left?
  7. 7.A price goes up by 50% and then goes up by 10% more. By what percent has it gone up in all? =
  8. 8.The price of a bicycle is ₹340. It goes up by 50%. What is the new price (in ₹)?
  9. 9.A water tank holds 1500 litres. 15% of the water is used. How many litres are left?
  10. 10.The price of a bicycle is ₹2540. It goes up by 25%. What is the new price (in ₹)?
  11. 11.The price of a bicycle is ₹4740. It goes up by 20%. What is the new price (in ₹)?
  12. 12.The price of a school bag changes from ₹3540 to ₹2832. By what percent did it come down?
  13. 13.The price of a school bag changes from ₹2300 to ₹2530. By what percent did it go up?
  14. 14.A price goes up by 40% and then goes up by 50% more. By what percent has it gone up in all? =
  15. 15.The price of a bicycle is ₹120. It goes up by 15%. What is the new price (in ₹)?
  16. 16.A price goes up by 15% and then goes up by 25% more. By what percent has it gone up in all? =
  17. 17.A town has 2640 people. Its population grows by 15%. How many people live there now?
  18. 18.A price comes down by 25% and then comes down by 40% more. By what percent has it come down in all? =
  19. 19.A water tank holds 3840 litres. 50% of the water is used. How many litres are left?
  20. 20.The price of a school bag changes from ₹1780 to ₹890. By what percent did it come down?
  21. 21.A price goes up by 50% and then goes up by 20% more. By what percent has it gone up in all? =
  22. 22.A water tank holds 1060 litres. 40% of the water is used. How many litres are left?
  23. 23.The price of a bicycle is ₹3360. It goes up by 25%. What is the new price (in ₹)?
  24. 24.The price of a school bag changes from ₹1760 to ₹2640. By what percent did it go up?
  25. 25.The price of a school bag changes from ₹3060 to ₹3213. By what percent did it go up?
  26. 26.A shop sells 1920 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  27. 27.A water tank holds 2360 litres. 20% of the water is used. How many litres are left?
  28. 28.A water tank holds 4680 litres. 50% of the water is used. How many litres are left?
  29. 29.The price of a school bag changes from ₹220 to ₹154. By what percent did it come down?
  30. 30.The price of a school bag changes from ₹2960 to ₹2516. By what percent did it come down?
  31. 31.A price goes up by 50% and then comes down by 30%. By what percent has it gone up in all? =
  32. 32.The price of a school bag changes from ₹2020 to ₹1919. By what percent did it come down?
  33. 33.A water tank holds 2680 litres. 10% of the water is used. How many litres are left?
  34. 34.The price of a bicycle is ₹940. It goes up by 15%. What is the new price (in ₹)?
  35. 35.A water tank holds 3700 litres. 15% of the water is used. How many litres are left?
  36. 36.A shop sells 1240 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  37. 37.The price of a bicycle is ₹2460. It goes up by 40%. What is the new price (in ₹)?
  38. 38.A water tank holds 2780 litres. 10% of the water is used. How many litres are left?
  39. 39.A price goes up by 50% and then goes up by 15% more. By what percent has it gone up in all? =
  40. 40.A water tank holds 2500 litres. 5% of the water is used. How many litres are left?

Answer key

  1. 50
  2. 620
  3. 55
  4. 1260
  5. 6960
  6. 1880
  7. 65
  8. 510
  9. 1275
  10. 3175
  11. 5688
  12. 20
  13. 10
  14. 110
  15. 138
  16. 43.75
  17. 3036
  18. 55
  19. 1920
  20. 50
  21. 80
  22. 636
  23. 4200
  24. 50
  25. 5
  26. 2016
  27. 1888
  28. 2340
  29. 30
  30. 15
  31. 5
  32. 5
  33. 2412
  34. 1081
  35. 3145
  36. 1860
  37. 3444
  38. 2502
  39. 72.5
  40. 2375

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