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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 108 · 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 4720 litres. 15% of the water is used. How many litres are left?
  2. 2.A water tank holds 2780 litres. 20% of the water is used. How many litres are left?
  3. 3.The price of a bicycle is ₹1200. It goes up by 30%. What is the new price (in ₹)?
  4. 4.A shop sells 500 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  5. 5.A price goes up by 20% and then comes down by 10%. By what percent has it gone up in all? =
  6. 6.The price of a school bag changes from ₹4600 to ₹4370. By what percent did it come down?
  7. 7.The price of a school bag changes from ₹2480 to ₹1860. By what percent did it come down?
  8. 8.The price of a school bag changes from ₹4460 to ₹4906. By what percent did it go up?
  9. 9.The price of a bicycle is ₹4060. It goes up by 25%. What is the new price (in ₹)?
  10. 10.A water tank holds 560 litres. 25% of the water is used. How many litres are left?
  11. 11.The price of a school bag changes from ₹2800 to ₹3220. By what percent did it go up?
  12. 12.A town has 2020 people. Its population grows by 20%. How many people live there now?
  13. 13.A price goes up by 20% and then goes up by 25% more. By what percent has it gone up in all? =
  14. 14.A town has 4840 people. Its population grows by 40%. How many people live there now?
  15. 15.A water tank holds 1580 litres. 20% of the water is used. How many litres are left?
  16. 16.A price goes up by 15% and then comes down by 5%. By what percent has it gone up in all? =
  17. 17.A town has 1040 people. Its population grows by 5%. How many people live there now?
  18. 18.A water tank holds 2160 litres. 40% of the water is used. How many litres are left?
  19. 19.A shop sells 1700 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  20. 20.A shop sells 760 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  21. 21.The price of a school bag changes from ₹2980 to ₹4470. By what percent did it go up?
  22. 22.The price of a school bag changes from ₹2220 to ₹2331. By what percent did it go up?
  23. 23.The price of a school bag changes from ₹1840 to ₹2116. By what percent did it go up?
  24. 24.The price of a bicycle is ₹540. It goes up by 30%. What is the new price (in ₹)?
  25. 25.A town has 1280 people. Its population grows by 15%. How many people live there now?
  26. 26.A price comes down by 15% and then comes down by 50% more. By what percent has it come down in all? =
  27. 27.A water tank holds 3820 litres. 10% of the water is used. How many litres are left?
  28. 28.A price goes up by 5% and then goes up by 20% more. By what percent has it gone up in all? =
  29. 29.A town has 140 people. Its population grows by 5%. How many people live there now?
  30. 30.A shop sells 2780 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  31. 31.A water tank holds 180 litres. 30% of the water is used. How many litres are left?
  32. 32.The price of a bicycle is ₹2640. It goes up by 5%. What is the new price (in ₹)?
  33. 33.A price goes up by 5% and then goes up by 5% more. By what percent has it gone up in all? =
  34. 34.A water tank holds 2660 litres. 5% of the water is used. How many litres are left?
  35. 35.A price comes down by 25% and then comes down by 25% more. By what percent has it come down in all? =
  36. 36.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  37. 37.A water tank holds 4920 litres. 25% of the water is used. How many litres are left?
  38. 38.A water tank holds 820 litres. 15% of the water is used. How many litres are left?
  39. 39.A shop sells 2200 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  40. 40.A price comes down by 15% and then comes down by 15% more. By what percent has it come down in all? =

Answer key

  1. 4012
  2. 2224
  3. 1560
  4. 700
  5. 8
  6. 5
  7. 25
  8. 10
  9. 5075
  10. 420
  11. 15
  12. 2424
  13. 50
  14. 6776
  15. 1264
  16. 9.25
  17. 1092
  18. 1296
  19. 1870
  20. 950
  21. 50
  22. 5
  23. 15
  24. 702
  25. 1472
  26. 57.5
  27. 3438
  28. 26
  29. 147
  30. 3058
  31. 126
  32. 2772
  33. 10.25
  34. 2527
  35. 43.75
  36. 37.5
  37. 3690
  38. 697
  39. 3080
  40. 27.75

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