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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 744 · 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 4320 litres. 15% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹2360 to ₹1770. By what percent did it come down?
  3. 3.The price of a school bag changes from ₹860 to ₹1290. By what percent did it go up?
  4. 4.A shop sells 540 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  5. 5.The price of a school bag changes from ₹200 to ₹100. By what percent did it come down?
  6. 6.A shop sells 4000 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  7. 7.A price goes up by 30% and then goes up by 10% more. By what percent has it gone up in all? =
  8. 8.A price goes up by 40% and then goes up by 30% more. By what percent has it gone up in all? =
  9. 9.A shop sells 2260 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  10. 10.A town has 3740 people. Its population grows by 5%. How many people live there now?
  11. 11.A water tank holds 3580 litres. 10% of the water is used. How many litres are left?
  12. 12.The price of a bicycle is ₹880. It goes up by 10%. What is the new price (in ₹)?
  13. 13.A water tank holds 2940 litres. 25% of the water is used. How many litres are left?
  14. 14.A price comes down by 40% and then comes down by 5% more. By what percent has it come down in all? =
  15. 15.A shop sells 640 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  16. 16.A water tank holds 1760 litres. 15% of the water is used. How many litres are left?
  17. 17.The price of a school bag changes from ₹4360 to ₹4142. By what percent did it come down?
  18. 18.A shop sells 1920 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  19. 19.A water tank holds 160 litres. 40% of the water is used. How many litres are left?
  20. 20.The price of a school bag changes from ₹100 to ₹90. By what percent did it come down?
  21. 21.The price of a school bag changes from ₹320 to ₹368. By what percent did it go up?
  22. 22.A price goes up by 50% and then comes down by 15%. By what percent has it gone up in all? =
  23. 23.The price of a bicycle is ₹3460. It goes up by 5%. What is the new price (in ₹)?
  24. 24.The price of a school bag changes from ₹580 to ₹609. By what percent did it go up?
  25. 25.The price of a bicycle is ₹2460. It goes up by 40%. What is the new price (in ₹)?
  26. 26.A shop sells 3500 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  27. 27.A shop sells 4600 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  28. 28.The price of a school bag changes from ₹4420 to ₹6630. By what percent did it go up?
  29. 29.The price of a bicycle is ₹2840. It goes up by 15%. What is the new price (in ₹)?
  30. 30.A price goes up by 15% and then goes up by 5% more. By what percent has it gone up in all? =
  31. 31.A price goes up by 15% and then goes up by 10% more. By what percent has it gone up in all? =
  32. 32.A water tank holds 360 litres. 10% of the water is used. How many litres are left?
  33. 33.A shop sells 1340 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  34. 34.The price of a bicycle is ₹880. It goes up by 5%. What is the new price (in ₹)?
  35. 35.A water tank holds 3820 litres. 30% of the water is used. How many litres are left?
  36. 36.A price goes up by 50% and then goes up by 30% more. By what percent has it gone up in all? =
  37. 37.The price of a school bag changes from ₹2940 to ₹2058. By what percent did it come down?
  38. 38.The price of a school bag changes from ₹4440 to ₹3774. By what percent did it come down?
  39. 39.A water tank holds 1920 litres. 20% of the water is used. How many litres are left?
  40. 40.A water tank holds 4860 litres. 15% of the water is used. How many litres are left?

Answer key

  1. 3672
  2. 25
  3. 50
  4. 702
  5. 50
  6. 6000
  7. 43
  8. 82
  9. 2938
  10. 3927
  11. 3222
  12. 968
  13. 2205
  14. 43
  15. 736
  16. 1496
  17. 5
  18. 2880
  19. 96
  20. 10
  21. 15
  22. 27.5
  23. 3633
  24. 5
  25. 3444
  26. 4900
  27. 5290
  28. 50
  29. 3266
  30. 20.75
  31. 26.5
  32. 324
  33. 1474
  34. 924
  35. 2674
  36. 95
  37. 30
  38. 15
  39. 1536
  40. 4131

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