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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 423 · 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 ₹4700 to ₹3760. By what percent did it come down?
  2. 2.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  3. 3.A price comes down by 15% and then comes down by 25% more. By what percent has it come down in all? =
  4. 4.The price of a bicycle is ₹3100. It goes up by 50%. What is the new price (in ₹)?
  5. 5.The price of a school bag changes from ₹1680 to ₹1428. By what percent did it come down?
  6. 6.The price of a school bag changes from ₹280 to ₹252. By what percent did it come down?
  7. 7.The price of a bicycle is ₹3400. It goes up by 50%. What is the new price (in ₹)?
  8. 8.A town has 400 people. Its population grows by 20%. How many people live there now?
  9. 9.A water tank holds 4700 litres. 15% of the water is used. How many litres are left?
  10. 10.The price of a bicycle is ₹1740. It goes up by 10%. What is the new price (in ₹)?
  11. 11.The price of a school bag changes from ₹4420 to ₹5746. By what percent did it go up?
  12. 12.A water tank holds 400 litres. 20% of the water is used. How many litres are left?
  13. 13.A price goes up by 40% and then goes up by 20% more. By what percent has it gone up in all? =
  14. 14.A price comes down by 20% and then comes down by 30% more. By what percent has it come down in all? =
  15. 15.A price goes up by 5% and then goes up by 5% more. By what percent has it gone up in all? =
  16. 16.A water tank holds 2700 litres. 20% of the water is used. How many litres are left?
  17. 17.A water tank holds 3760 litres. 40% of the water is used. How many litres are left?
  18. 18.A price goes up by 5% and then goes up by 10% more. By what percent has it gone up in all? =
  19. 19.The price of a bicycle is ₹640. It goes up by 5%. What is the new price (in ₹)?
  20. 20.The price of a school bag changes from ₹460 to ₹529. By what percent did it go up?
  21. 21.The price of a school bag changes from ₹4300 to ₹4515. By what percent did it go up?
  22. 22.A price goes up by 20% and then comes down by 5%. By what percent has it gone up in all? =
  23. 23.The price of a school bag changes from ₹800 to ₹880. By what percent did it go up?
  24. 24.The price of a school bag changes from ₹2740 to ₹4110. By what percent did it go up?
  25. 25.The price of a school bag changes from ₹340 to ₹374. By what percent did it go up?
  26. 26.The price of a school bag changes from ₹2160 to ₹2376. By what percent did it go up?
  27. 27.The price of a school bag changes from ₹1120 to ₹784. By what percent did it come down?
  28. 28.The price of a school bag changes from ₹440 to ₹528. By what percent did it go up?
  29. 29.A water tank holds 920 litres. 30% of the water is used. How many litres are left?
  30. 30.The price of a school bag changes from ₹1520 to ₹1596. By what percent did it go up?
  31. 31.A water tank holds 1560 litres. 30% of the water is used. How many litres are left?
  32. 32.A water tank holds 180 litres. 30% of the water is used. How many litres are left?
  33. 33.The price of a school bag changes from ₹1880 to ₹2444. By what percent did it go up?
  34. 34.A water tank holds 480 litres. 50% of the water is used. How many litres are left?
  35. 35.A water tank holds 1820 litres. 15% of the water is used. How many litres are left?
  36. 36.The price of a school bag changes from ₹720 to ₹1080. By what percent did it go up?
  37. 37.A water tank holds 4260 litres. 40% of the water is used. How many litres are left?
  38. 38.A water tank holds 1080 litres. 25% of the water is used. How many litres are left?
  39. 39.A water tank holds 3100 litres. 5% of the water is used. How many litres are left?
  40. 40.The price of a bicycle is ₹3800. It goes up by 10%. What is the new price (in ₹)?

Answer key

  1. 20
  2. 37.5
  3. 36.25
  4. 4650
  5. 15
  6. 10
  7. 5100
  8. 480
  9. 3995
  10. 1914
  11. 30
  12. 320
  13. 68
  14. 44
  15. 10.25
  16. 2160
  17. 2256
  18. 15.5
  19. 672
  20. 15
  21. 5
  22. 14
  23. 10
  24. 50
  25. 10
  26. 10
  27. 30
  28. 20
  29. 644
  30. 5
  31. 1092
  32. 126
  33. 30
  34. 240
  35. 1547
  36. 50
  37. 2556
  38. 810
  39. 2945
  40. 4180

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