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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 542 · 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 price goes up by 15% and then comes down by 10%. By what percent has it gone up in all? =
  2. 2.A price goes up by 40% and then goes up by 5% more. By what percent has it gone up in all? =
  3. 3.A water tank holds 1640 litres. 5% of the water is used. How many litres are left?
  4. 4.The price of a school bag changes from ₹1000 to ₹1200. By what percent did it go up?
  5. 5.A price comes down by 50% and then comes down by 50% more. By what percent has it come down in all? =
  6. 6.A water tank holds 1960 litres. 25% of the water is used. How many litres are left?
  7. 7.A water tank holds 4820 litres. 5% of the water is used. How many litres are left?
  8. 8.The price of a school bag changes from ₹3880 to ₹5044. By what percent did it go up?
  9. 9.A shop sells 800 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  10. 10.A town has 1000 people. Its population grows by 50%. How many people live there now?
  11. 11.A water tank holds 3900 litres. 10% of the water is used. How many litres are left?
  12. 12.A water tank holds 3260 litres. 50% of the water is used. How many litres are left?
  13. 13.The price of a school bag changes from ₹4240 to ₹2120. By what percent did it come down?
  14. 14.A town has 2520 people. Its population grows by 5%. How many people live there now?
  15. 15.A price goes up by 50% and then goes up by 5% more. By what percent has it gone up in all? =
  16. 16.A water tank holds 4420 litres. 5% of the water is used. How many litres are left?
  17. 17.The price of a school bag changes from ₹580 to ₹290. By what percent did it come down?
  18. 18.The price of a school bag changes from ₹1140 to ₹1482. By what percent did it go up?
  19. 19.A price goes up by 15% and then goes up by 50% more. By what percent has it gone up in all? =
  20. 20.The price of a bicycle is ₹2240. It goes up by 15%. What is the new price (in ₹)?
  21. 21.The price of a school bag changes from ₹4900 to ₹7350. By what percent did it go up?
  22. 22.The price of a school bag changes from ₹1060 to ₹1219. By what percent did it go up?
  23. 23.A price comes down by 25% and then comes down by 50% more. By what percent has it come down in all? =
  24. 24.The price of a bicycle is ₹600. It goes up by 20%. What is the new price (in ₹)?
  25. 25.The price of a school bag changes from ₹2720 to ₹3400. By what percent did it go up?
  26. 26.The price of a school bag changes from ₹4880 to ₹3904. By what percent did it come down?
  27. 27.A town has 2200 people. Its population grows by 20%. How many people live there now?
  28. 28.A town has 3200 people. Its population grows by 5%. How many people live there now?
  29. 29.A price comes down by 40% and then comes down by 30% more. By what percent has it come down in all? =
  30. 30.A water tank holds 980 litres. 25% of the water is used. How many litres are left?
  31. 31.A town has 1660 people. Its population grows by 25%. How many people live there now?
  32. 32.A shop sells 80 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  33. 33.The price of a school bag changes from ₹2200 to ₹2750. By what percent did it go up?
  34. 34.A shop sells 100 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  35. 35.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  36. 36.A price goes up by 5% and then goes up by 15% more. By what percent has it gone up in all? =
  37. 37.A price goes up by 40% and then goes up by 25% more. By what percent has it gone up in all? =
  38. 38.The price of a school bag changes from ₹1520 to ₹1672. By what percent did it go up?
  39. 39.A town has 3220 people. Its population grows by 20%. How many people live there now?
  40. 40.A price comes down by 40% and then comes down by 25% more. By what percent has it come down in all? =

Answer key

  1. 3.5
  2. 47
  3. 1558
  4. 20
  5. 75
  6. 1470
  7. 4579
  8. 30
  9. 1000
  10. 1500
  11. 3510
  12. 1630
  13. 50
  14. 2646
  15. 57.5
  16. 4199
  17. 50
  18. 30
  19. 72.5
  20. 2576
  21. 50
  22. 15
  23. 62.5
  24. 720
  25. 25
  26. 20
  27. 2640
  28. 3360
  29. 58
  30. 735
  31. 2075
  32. 104
  33. 25
  34. 130
  35. 21
  36. 20.75
  37. 75
  38. 10
  39. 3864
  40. 55

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