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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 426 · 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 2120 litres. 20% of the water is used. How many litres are left?
  2. 2.A water tank holds 920 litres. 5% of the water is used. How many litres are left?
  3. 3.The price of a school bag changes from ₹3440 to ₹3612. By what percent did it go up?
  4. 4.A water tank holds 1220 litres. 50% of the water is used. How many litres are left?
  5. 5.A price goes up by 30% and then goes up by 40% more. By what percent has it gone up in all? =
  6. 6.A price goes up by 30% and then comes down by 15%. By what percent has it gone up in all? =
  7. 7.A price comes down by 15% and then comes down by 40% more. By what percent has it come down in all? =
  8. 8.A water tank holds 3780 litres. 25% of the water is used. How many litres are left?
  9. 9.A water tank holds 4400 litres. 15% of the water is used. How many litres are left?
  10. 10.A water tank holds 2780 litres. 15% of the water is used. How many litres are left?
  11. 11.A water tank holds 1840 litres. 5% of the water is used. How many litres are left?
  12. 12.A price goes up by 30% and then goes up by 15% more. By what percent has it gone up in all? =
  13. 13.A price goes up by 40% and then comes down by 20%. By what percent has it gone up in all? =
  14. 14.A water tank holds 4920 litres. 25% of the water is used. How many litres are left?
  15. 15.The price of a school bag changes from ₹280 to ₹294. By what percent did it go up?
  16. 16.The price of a bicycle is ₹2760. It goes up by 30%. What is the new price (in ₹)?
  17. 17.A shop sells 3180 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  18. 18.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
  19. 19.A water tank holds 2240 litres. 30% of the water is used. How many litres are left?
  20. 20.A water tank holds 1880 litres. 5% of the water is used. How many litres are left?
  21. 21.A shop sells 3220 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  22. 22.A water tank holds 1040 litres. 40% of the water is used. How many litres are left?
  23. 23.A water tank holds 860 litres. 20% of the water is used. How many litres are left?
  24. 24.A water tank holds 1720 litres. 15% of the water is used. How many litres are left?
  25. 25.The price of a school bag changes from ₹4740 to ₹4266. By what percent did it come down?
  26. 26.A price comes down by 10% and then comes down by 30% more. By what percent has it come down in all? =
  27. 27.The price of a school bag changes from ₹2120 to ₹1802. By what percent did it come down?
  28. 28.A price goes up by 40% and then comes down by 15%. By what percent has it gone up in all? =
  29. 29.The price of a school bag changes from ₹1200 to ₹960. By what percent did it come down?
  30. 30.The price of a school bag changes from ₹500 to ₹600. By what percent did it go up?
  31. 31.A price comes down by 40% and then comes down by 25% more. By what percent has it come down in all? =
  32. 32.A town has 840 people. Its population grows by 25%. How many people live there now?
  33. 33.The price of a bicycle is ₹3300. It goes up by 10%. What is the new price (in ₹)?
  34. 34.A water tank holds 2880 litres. 5% of the water is used. How many litres are left?
  35. 35.A water tank holds 2280 litres. 10% of the water is used. How many litres are left?
  36. 36.The price of a school bag changes from ₹980 to ₹490. By what percent did it come down?
  37. 37.The price of a bicycle is ₹4760. It goes up by 15%. What is the new price (in ₹)?
  38. 38.The price of a school bag changes from ₹2340 to ₹1989. By what percent did it come down?
  39. 39.A water tank holds 500 litres. 30% of the water is used. How many litres are left?
  40. 40.The price of a school bag changes from ₹3020 to ₹3624. By what percent did it go up?

Answer key

  1. 1696
  2. 874
  3. 5
  4. 610
  5. 82
  6. 10.5
  7. 49
  8. 2835
  9. 3740
  10. 2363
  11. 1748
  12. 49.5
  13. 12
  14. 3690
  15. 5
  16. 3588
  17. 4134
  18. 9.75
  19. 1568
  20. 1786
  21. 3542
  22. 624
  23. 688
  24. 1462
  25. 10
  26. 37
  27. 15
  28. 19
  29. 20
  30. 20
  31. 55
  32. 1050
  33. 3630
  34. 2736
  35. 2052
  36. 50
  37. 5474
  38. 15
  39. 350
  40. 20

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