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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 573 · 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 4660 litres. 40% of the water is used. How many litres are left?
  2. 2.The price of a bicycle is ₹4620. It goes up by 20%. What is the new price (in ₹)?
  3. 3.The price of a school bag changes from ₹2280 to ₹1710. By what percent did it come down?
  4. 4.A water tank holds 3520 litres. 5% of the water is used. How many litres are left?
  5. 5.A water tank holds 1920 litres. 40% of the water is used. How many litres are left?
  6. 6.A price goes up by 50% and then goes up by 50% more. By what percent has it gone up in all? =
  7. 7.A water tank holds 4740 litres. 20% of the water is used. How many litres are left?
  8. 8.A water tank holds 2300 litres. 10% of the water is used. How many litres are left?
  9. 9.A shop sells 160 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  10. 10.A price goes up by 30% and then goes up by 30% more. By what percent has it gone up in all? =
  11. 11.A shop sells 2520 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  12. 12.The price of a bicycle is ₹600. It goes up by 15%. What is the new price (in ₹)?
  13. 13.A price goes up by 20% and then goes up by 5% more. By what percent has it gone up in all? =
  14. 14.The price of a school bag changes from ₹260 to ₹338. By what percent did it go up?
  15. 15.The price of a school bag changes from ₹660 to ₹693. By what percent did it go up?
  16. 16.The price of a school bag changes from ₹4500 to ₹5850. By what percent did it go up?
  17. 17.The price of a school bag changes from ₹3000 to ₹2550. By what percent did it come down?
  18. 18.The price of a school bag changes from ₹940 to ₹752. By what percent did it come down?
  19. 19.A town has 4940 people. Its population grows by 20%. How many people live there now?
  20. 20.A town has 3980 people. Its population grows by 5%. How many people live there now?
  21. 21.A price goes up by 25% and then goes up by 25% more. By what percent has it gone up in all? =
  22. 22.A price comes down by 5% and then comes down by 40% more. By what percent has it come down in all? =
  23. 23.A town has 3360 people. Its population grows by 15%. How many people live there now?
  24. 24.The price of a school bag changes from ₹2780 to ₹2919. By what percent did it go up?
  25. 25.A water tank holds 3180 litres. 15% of the water is used. How many litres are left?
  26. 26.The price of a bicycle is ₹2220. It goes up by 50%. What is the new price (in ₹)?
  27. 27.A price comes down by 15% and then comes down by 15% more. By what percent has it come down in all? =
  28. 28.The price of a school bag changes from ₹3600 to ₹1800. By what percent did it come down?
  29. 29.A price goes up by 5% and then goes up by 20% more. By what percent has it gone up in all? =
  30. 30.The price of a school bag changes from ₹1280 to ₹640. By what percent did it come down?
  31. 31.A price goes up by 15% and then goes up by 25% more. By what percent has it gone up in all? =
  32. 32.The price of a school bag changes from ₹2760 to ₹2898. By what percent did it go up?
  33. 33.A shop sells 980 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  34. 34.The price of a bicycle is ₹3200. It goes up by 5%. What is the new price (in ₹)?
  35. 35.A water tank holds 800 litres. 50% of the water is used. How many litres are left?
  36. 36.The price of a bicycle is ₹3460. It goes up by 20%. What is the new price (in ₹)?
  37. 37.The price of a bicycle is ₹3440. It goes up by 30%. What is the new price (in ₹)?
  38. 38.A water tank holds 4520 litres. 15% of the water is used. How many litres are left?
  39. 39.The price of a school bag changes from ₹3300 to ₹2805. By what percent did it come down?
  40. 40.A price goes up by 15% and then goes up by 30% more. By what percent has it gone up in all? =

Answer key

  1. 2796
  2. 5544
  3. 25
  4. 3344
  5. 1152
  6. 125
  7. 3792
  8. 2070
  9. 200
  10. 69
  11. 3780
  12. 690
  13. 26
  14. 30
  15. 5
  16. 30
  17. 15
  18. 20
  19. 5928
  20. 4179
  21. 56.25
  22. 43
  23. 3864
  24. 5
  25. 2703
  26. 3330
  27. 27.75
  28. 50
  29. 26
  30. 50
  31. 43.75
  32. 5
  33. 1372
  34. 3360
  35. 400
  36. 4152
  37. 4472
  38. 3842
  39. 15
  40. 49.5

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