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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 503 · 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 ₹1440 to ₹864. By what percent did it come down?
  2. 2.A town has 100 people. Its population grows by 5%. How many people live there now?
  3. 3.A town has 5000 people. Its population grows by 20%. How many people live there now?
  4. 4.The price of a bicycle is ₹3940. It goes up by 40%. What is the new price (in ₹)?
  5. 5.The price of a school bag changes from ₹2020 to ₹1818. By what percent did it come down?
  6. 6.A price goes up by 20% and then goes up by 50% more. By what percent has it gone up in all? =
  7. 7.The price of a bicycle is ₹400. It goes up by 20%. What is the new price (in ₹)?
  8. 8.The price of a school bag changes from ₹940 to ₹1128. By what percent did it go up?
  9. 9.A price goes up by 40% and then goes up by 40% more. By what percent has it gone up in all? =
  10. 10.A price goes up by 20% and then goes up by 20% more. By what percent has it gone up in all? =
  11. 11.A price comes down by 20% and then comes down by 20% more. By what percent has it come down in all? =
  12. 12.A price goes up by 40% and then goes up by 15% more. By what percent has it gone up in all? =
  13. 13.A price goes up by 50% and then comes down by 15%. By what percent has it gone up in all? =
  14. 14.A price goes up by 40% and then comes down by 15%. By what percent has it gone up in all? =
  15. 15.The price of a bicycle is ₹4080. It goes up by 10%. What is the new price (in ₹)?
  16. 16.The price of a school bag changes from ₹1480 to ₹1776. By what percent did it go up?
  17. 17.A water tank holds 1280 litres. 10% of the water is used. How many litres are left?
  18. 18.A town has 4060 people. Its population grows by 20%. How many people live there now?
  19. 19.A town has 1540 people. Its population grows by 40%. How many people live there now?
  20. 20.The price of a school bag changes from ₹840 to ₹966. By what percent did it go up?
  21. 21.The price of a bicycle is ₹560. It goes up by 30%. What is the new price (in ₹)?
  22. 22.A town has 700 people. Its population grows by 10%. How many people live there now?
  23. 23.The price of a bicycle is ₹1940. It goes up by 40%. What is the new price (in ₹)?
  24. 24.The price of a school bag changes from ₹1680 to ₹2100. By what percent did it go up?
  25. 25.A water tank holds 4180 litres. 10% of the water is used. How many litres are left?
  26. 26.A price comes down by 20% and then comes down by 50% more. By what percent has it come down in all? =
  27. 27.A price goes up by 30% and then comes down by 20%. By what percent has it gone up in all? =
  28. 28.The price of a school bag changes from ₹2720 to ₹2040. By what percent did it come down?
  29. 29.A water tank holds 3100 litres. 20% of the water is used. How many litres are left?
  30. 30.A town has 1020 people. Its population grows by 30%. How many people live there now?
  31. 31.A water tank holds 2080 litres. 10% of the water is used. How many litres are left?
  32. 32.A water tank holds 3600 litres. 25% of the water is used. How many litres are left?
  33. 33.The price of a school bag changes from ₹1000 to ₹1250. By what percent did it go up?
  34. 34.The price of a school bag changes from ₹620 to ₹930. By what percent did it go up?
  35. 35.A price comes down by 10% and then comes down by 40% more. By what percent has it come down in all? =
  36. 36.The price of a school bag changes from ₹3280 to ₹3936. By what percent did it go up?
  37. 37.The price of a school bag changes from ₹2200 to ₹1100. By what percent did it come down?
  38. 38.The price of a school bag changes from ₹2800 to ₹3080. By what percent did it go up?
  39. 39.A price goes up by 5% and then goes up by 40% more. By what percent has it gone up in all? =
  40. 40.A water tank holds 920 litres. 5% of the water is used. How many litres are left?

Answer key

  1. 40
  2. 105
  3. 6000
  4. 5516
  5. 10
  6. 80
  7. 480
  8. 20
  9. 96
  10. 44
  11. 36
  12. 61
  13. 27.5
  14. 19
  15. 4488
  16. 20
  17. 1152
  18. 4872
  19. 2156
  20. 15
  21. 728
  22. 770
  23. 2716
  24. 25
  25. 3762
  26. 60
  27. 4
  28. 25
  29. 2480
  30. 1326
  31. 1872
  32. 2700
  33. 25
  34. 50
  35. 46
  36. 20
  37. 50
  38. 10
  39. 47
  40. 874

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