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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 584 · 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 3000 litres. 20% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹2580 to ₹2451. By what percent did it come down?
  3. 3.A shop sells 4420 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  4. 4.The price of a bicycle is ₹2120. It goes up by 30%. What is the new price (in ₹)?
  5. 5.A water tank holds 1820 litres. 25% of the water is used. How many litres are left?
  6. 6.The price of a bicycle is ₹1620. It goes up by 10%. What is the new price (in ₹)?
  7. 7.A water tank holds 2720 litres. 20% of the water is used. How many litres are left?
  8. 8.The price of a school bag changes from ₹1660 to ₹996. By what percent did it come down?
  9. 9.The price of a bicycle is ₹3220. It goes up by 40%. What is the new price (in ₹)?
  10. 10.The price of a bicycle is ₹4000. It goes up by 10%. What is the new price (in ₹)?
  11. 11.A town has 5000 people. Its population grows by 20%. How many people live there now?
  12. 12.The price of a bicycle is ₹4540. It goes up by 25%. What is the new price (in ₹)?
  13. 13.A price goes up by 25% and then goes up by 20% more. By what percent has it gone up in all? =
  14. 14.A price comes down by 10% and then comes down by 10% more. By what percent has it come down in all? =
  15. 15.The price of a school bag changes from ₹2500 to ₹1250. By what percent did it come down?
  16. 16.The price of a school bag changes from ₹4320 to ₹6048. By what percent did it go up?
  17. 17.A price comes down by 50% and then comes down by 5% more. By what percent has it come down in all? =
  18. 18.A shop sells 3540 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  19. 19.A water tank holds 2460 litres. 15% of the water is used. How many litres are left?
  20. 20.A price goes up by 40% and then goes up by 25% more. By what percent has it gone up in all? =
  21. 21.The price of a school bag changes from ₹2180 to ₹2071. By what percent did it come down?
  22. 22.The price of a school bag changes from ₹5000 to ₹2500. By what percent did it come down?
  23. 23.A price goes up by 5% and then goes up by 25% more. By what percent has it gone up in all? =
  24. 24.A water tank holds 920 litres. 50% of the water is used. How many litres are left?
  25. 25.The price of a school bag changes from ₹3480 to ₹5220. By what percent did it go up?
  26. 26.The price of a bicycle is ₹1000. It goes up by 50%. What is the new price (in ₹)?
  27. 27.The price of a bicycle is ₹840. It goes up by 15%. What is the new price (in ₹)?
  28. 28.A town has 3980 people. Its population grows by 20%. How many people live there now?
  29. 29.A water tank holds 1400 litres. 50% of the water is used. How many litres are left?
  30. 30.A water tank holds 2800 litres. 15% of the water is used. How many litres are left?
  31. 31.A shop sells 800 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  32. 32.The price of a bicycle is ₹1500. It goes up by 5%. What is the new price (in ₹)?
  33. 33.The price of a school bag changes from ₹4820 to ₹3615. By what percent did it come down?
  34. 34.A shop sells 1440 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  35. 35.A town has 1600 people. Its population grows by 5%. How many people live there now?
  36. 36.A price goes up by 50% and then comes down by 30%. By what percent has it gone up in all? =
  37. 37.A shop sells 4500 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  38. 38.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  39. 39.A town has 3760 people. Its population grows by 50%. How many people live there now?
  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. 2400
  2. 5
  3. 5525
  4. 2756
  5. 1365
  6. 1782
  7. 2176
  8. 40
  9. 4508
  10. 4400
  11. 6000
  12. 5675
  13. 50
  14. 19
  15. 50
  16. 40
  17. 52.5
  18. 4071
  19. 2091
  20. 75
  21. 5
  22. 50
  23. 31.25
  24. 460
  25. 50
  26. 1500
  27. 966
  28. 4776
  29. 700
  30. 2380
  31. 1120
  32. 1575
  33. 25
  34. 1800
  35. 1680
  36. 5
  37. 4725
  38. 21
  39. 5640
  40. 49.5

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