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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 924 · 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 3060 litres. 30% of the water is used. How many litres are left?
  2. 2.A price goes up by 25% and then goes up by 20% more. By what percent has it gone up in all? =
  3. 3.A price comes down by 25% and then comes down by 25% more. By what percent has it come down in all? =
  4. 4.The price of a school bag changes from ₹4100 to ₹4920. By what percent did it go up?
  5. 5.A shop sells 1820 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  6. 6.A price comes down by 20% and then comes down by 5% more. By what percent has it come down in all? =
  7. 7.A town has 500 people. Its population grows by 20%. How many people live there now?
  8. 8.A town has 1640 people. Its population grows by 30%. How many people live there now?
  9. 9.A price goes up by 15% and then comes down by 5%. By what percent has it gone up in all? =
  10. 10.The price of a bicycle is ₹880. It goes up by 10%. What is the new price (in ₹)?
  11. 11.A town has 960 people. Its population grows by 5%. How many people live there now?
  12. 12.A water tank holds 540 litres. 5% of the water is used. How many litres are left?
  13. 13.A price goes up by 30% and then comes down by 15%. By what percent has it gone up in all? =
  14. 14.A water tank holds 1440 litres. 50% of the water is used. How many litres are left?
  15. 15.A price goes up by 10% and then goes up by 50% more. By what percent has it gone up in all? =
  16. 16.The price of a school bag changes from ₹2980 to ₹3427. By what percent did it go up?
  17. 17.The price of a school bag changes from ₹1000 to ₹750. By what percent did it come down?
  18. 18.The price of a school bag changes from ₹800 to ₹920. By what percent did it go up?
  19. 19.A town has 640 people. Its population grows by 20%. How many people live there now?
  20. 20.A price goes up by 20% and then goes up by 20% more. By what percent has it gone up in all? =
  21. 21.The price of a bicycle is ₹780. It goes up by 20%. What is the new price (in ₹)?
  22. 22.The price of a bicycle is ₹3640. It goes up by 10%. What is the new price (in ₹)?
  23. 23.A price goes up by 50% and then goes up by 10% more. By what percent has it gone up in all? =
  24. 24.A price comes down by 5% and then comes down by 40% more. By what percent has it come down in all? =
  25. 25.A shop sells 300 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  26. 26.A price comes down by 25% and then comes down by 5% more. By what percent has it come down in all? =
  27. 27.The price of a school bag changes from ₹4520 to ₹5424. By what percent did it go up?
  28. 28.The price of a school bag changes from ₹4680 to ₹4446. By what percent did it come down?
  29. 29.The price of a school bag changes from ₹1000 to ₹1100. By what percent did it go up?
  30. 30.A shop sells 1040 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  31. 31.A price comes down by 30% and then comes down by 10% more. By what percent has it come down in all? =
  32. 32.A water tank holds 4180 litres. 30% of the water is used. How many litres are left?
  33. 33.A town has 2020 people. Its population grows by 30%. How many people live there now?
  34. 34.A shop sells 4480 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  35. 35.A price goes up by 20% and then goes up by 40% more. By what percent has it gone up in all? =
  36. 36.The price of a school bag changes from ₹1480 to ₹1850. By what percent did it go up?
  37. 37.The price of a bicycle is ₹3940. It goes up by 15%. What is the new price (in ₹)?
  38. 38.A price goes up by 50% and then goes up by 20% more. By what percent has it gone up in all? =
  39. 39.A price goes up by 30% and then goes up by 40% more. By what percent has it gone up in all? =
  40. 40.A water tank holds 840 litres. 5% of the water is used. How many litres are left?

Answer key

  1. 2142
  2. 50
  3. 43.75
  4. 20
  5. 2366
  6. 24
  7. 600
  8. 2132
  9. 9.25
  10. 968
  11. 1008
  12. 513
  13. 10.5
  14. 720
  15. 65
  16. 15
  17. 25
  18. 15
  19. 768
  20. 44
  21. 936
  22. 4004
  23. 65
  24. 43
  25. 450
  26. 28.75
  27. 20
  28. 5
  29. 10
  30. 1092
  31. 37
  32. 2926
  33. 2626
  34. 5152
  35. 68
  36. 25
  37. 4531
  38. 80
  39. 82
  40. 798

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