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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 118 · 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.The price of a school bag changes from ₹2020 to ₹1919. By what percent did it come down?
  2. 2.The price of a school bag changes from ₹420 to ₹546. By what percent did it go up?
  3. 3.A price goes up by 25% and then goes up by 5% more. By what percent has it gone up in all? =
  4. 4.A price goes up by 25% and then goes up by 25% more. By what percent has it gone up in all? =
  5. 5.The price of a school bag changes from ₹3920 to ₹4312. By what percent did it go up?
  6. 6.A price goes up by 15% and then goes up by 25% more. By what percent has it gone up in all? =
  7. 7.The price of a bicycle is ₹300. It goes up by 20%. What is the new price (in ₹)?
  8. 8.A price goes up by 10% and then goes up by 15% more. By what percent has it gone up in all? =
  9. 9.A water tank holds 820 litres. 15% of the water is used. How many litres are left?
  10. 10.A town has 380 people. Its population grows by 25%. How many people live there now?
  11. 11.A water tank holds 3780 litres. 25% of the water is used. How many litres are left?
  12. 12.A price goes up by 50% and then comes down by 20%. By what percent has it gone up in all? =
  13. 13.A water tank holds 4680 litres. 40% of the water is used. How many litres are left?
  14. 14.A shop sells 480 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  15. 15.The price of a school bag changes from ₹1440 to ₹864. By what percent did it come down?
  16. 16.A shop sells 120 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  17. 17.A price goes up by 40% and then goes up by 30% more. By what percent has it gone up in all? =
  18. 18.A shop sells 3920 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  19. 19.A price comes down by 40% and then comes down by 40% more. By what percent has it come down in all? =
  20. 20.The price of a school bag changes from ₹4880 to ₹4636. By what percent did it come down?
  21. 21.A price comes down by 50% and then comes down by 20% more. By what percent has it come down in all? =
  22. 22.The price of a bicycle is ₹4560. It goes up by 5%. What is the new price (in ₹)?
  23. 23.A shop sells 1660 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  24. 24.The price of a school bag changes from ₹580 to ₹464. By what percent did it come down?
  25. 25.A town has 3800 people. Its population grows by 40%. How many people live there now?
  26. 26.The price of a bicycle is ₹1100. It goes up by 30%. What is the new price (in ₹)?
  27. 27.A water tank holds 3600 litres. 25% of the water is used. How many litres are left?
  28. 28.A town has 2160 people. Its population grows by 40%. How many people live there now?
  29. 29.A town has 3980 people. Its population grows by 25%. How many people live there now?
  30. 30.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  31. 31.The price of a school bag changes from ₹2380 to ₹3094. By what percent did it go up?
  32. 32.A shop sells 4000 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  33. 33.A water tank holds 4900 litres. 30% of the water is used. How many litres are left?
  34. 34.The price of a bicycle is ₹4340. It goes up by 5%. What is the new price (in ₹)?
  35. 35.The price of a school bag changes from ₹2520 to ₹2772. By what percent did it go up?
  36. 36.A price comes down by 15% and then comes down by 50% more. By what percent has it come down in all? =
  37. 37.A price goes up by 20% and then goes up by 25% more. By what percent has it gone up in all? =
  38. 38.A price comes down by 15% and then comes down by 40% more. By what percent has it come down in all? =
  39. 39.A price comes down by 15% and then comes down by 20% more. By what percent has it come down in all? =
  40. 40.A price comes down by 10% and then comes down by 40% more. By what percent has it come down in all? =

Answer key

  1. 5
  2. 30
  3. 31.25
  4. 56.25
  5. 10
  6. 43.75
  7. 360
  8. 26.5
  9. 697
  10. 475
  11. 2835
  12. 20
  13. 2808
  14. 528
  15. 40
  16. 144
  17. 82
  18. 4900
  19. 64
  20. 5
  21. 60
  22. 4788
  23. 2075
  24. 20
  25. 5320
  26. 1430
  27. 2700
  28. 3024
  29. 4975
  30. 37.5
  31. 30
  32. 5600
  33. 3430
  34. 4557
  35. 10
  36. 57.5
  37. 50
  38. 49
  39. 32
  40. 46

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