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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 199 · 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 3640 litres. 20% of the water is used. How many litres are left?
  2. 2.The price of a bicycle is ₹3780. It goes up by 5%. What is the new price (in ₹)?
  3. 3.The price of a school bag changes from ₹1080 to ₹918. By what percent did it come down?
  4. 4.A water tank holds 4280 litres. 25% of the water is used. How many litres are left?
  5. 5.The price of a school bag changes from ₹1940 to ₹2328. By what percent did it go up?
  6. 6.A shop sells 3940 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  7. 7.A water tank holds 1240 litres. 15% of the water is used. How many litres are left?
  8. 8.The price of a school bag changes from ₹2280 to ₹1824. By what percent did it come down?
  9. 9.A water tank holds 1140 litres. 10% of the water is used. How many litres are left?
  10. 10.A water tank holds 1740 litres. 25% of the water is used. How many litres are left?
  11. 11.The price of a school bag changes from ₹3320 to ₹4648. By what percent did it go up?
  12. 12.The price of a school bag changes from ₹340 to ₹170. By what percent did it come down?
  13. 13.A price goes up by 50% and then goes up by 50% more. By what percent has it gone up in all? =
  14. 14.A price goes up by 30% and then goes up by 40% more. By what percent has it gone up in all? =
  15. 15.The price of a bicycle is ₹3980. It goes up by 10%. What is the new price (in ₹)?
  16. 16.The price of a school bag changes from ₹5000 to ₹3500. By what percent did it come down?
  17. 17.A town has 3400 people. Its population grows by 10%. How many people live there now?
  18. 18.The price of a school bag changes from ₹1480 to ₹1776. By what percent did it go up?
  19. 19.A price goes up by 25% and then goes up by 30% more. By what percent has it gone up in all? =
  20. 20.A price comes down by 20% and then comes down by 5% more. By what percent has it come down in all? =
  21. 21.A water tank holds 3820 litres. 15% of the water is used. How many litres are left?
  22. 22.A water tank holds 2400 litres. 15% of the water is used. How many litres are left?
  23. 23.A shop sells 640 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  24. 24.A price goes up by 25% and then comes down by 15%. By what percent has it gone up in all? =
  25. 25.A town has 4100 people. Its population grows by 25%. How many people live there now?
  26. 26.A water tank holds 3360 litres. 40% of the water is used. How many litres are left?
  27. 27.The price of a bicycle is ₹2760. It goes up by 15%. What is the new price (in ₹)?
  28. 28.A town has 560 people. Its population grows by 5%. How many people live there now?
  29. 29.A price goes up by 25% and then comes down by 5%. By what percent has it gone up in all? =
  30. 30.A price comes down by 30% and then comes down by 10% more. By what percent has it come down in all? =
  31. 31.The price of a bicycle is ₹1920. It goes up by 40%. What is the new price (in ₹)?
  32. 32.A price comes down by 50% and then comes down by 25% more. By what percent has it come down in all? =
  33. 33.A water tank holds 2960 litres. 50% of the water is used. How many litres are left?
  34. 34.A water tank holds 2600 litres. 5% of the water is used. How many litres are left?
  35. 35.A price goes up by 30% and then goes up by 30% more. By what percent has it gone up in all? =
  36. 36.A town has 2520 people. Its population grows by 15%. How many people live there now?
  37. 37.A shop sells 2860 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  38. 38.A price goes up by 20% and then goes up by 10% more. By what percent has it gone up in all? =
  39. 39.A town has 4100 people. Its population grows by 20%. How many people live there now?
  40. 40.A water tank holds 4580 litres. 5% of the water is used. How many litres are left?

Answer key

  1. 2912
  2. 3969
  3. 15
  4. 3210
  5. 20
  6. 5122
  7. 1054
  8. 20
  9. 1026
  10. 1305
  11. 40
  12. 50
  13. 125
  14. 82
  15. 4378
  16. 30
  17. 3740
  18. 20
  19. 62.5
  20. 24
  21. 3247
  22. 2040
  23. 736
  24. 6.25
  25. 5125
  26. 2016
  27. 3174
  28. 588
  29. 18.75
  30. 37
  31. 2688
  32. 62.5
  33. 1480
  34. 2470
  35. 69
  36. 2898
  37. 3432
  38. 32
  39. 4920
  40. 4351

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