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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 661 · 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 goes up by 5% more. By what percent has it gone up in all? =
  2. 2.The price of a school bag changes from ₹840 to ₹1260. By what percent did it go up?
  3. 3.A water tank holds 2680 litres. 10% of the water is used. How many litres are left?
  4. 4.A town has 660 people. Its population grows by 5%. How many people live there now?
  5. 5.The price of a bicycle is ₹600. It goes up by 30%. What is the new price (in ₹)?
  6. 6.A price goes up by 20% and then comes down by 10%. By what percent has it gone up in all? =
  7. 7.A price goes up by 50% and then comes down by 10%. By what percent has it gone up in all? =
  8. 8.The price of a school bag changes from ₹380 to ₹570. By what percent did it go up?
  9. 9.A price goes up by 40% and then goes up by 25% more. By what percent has it gone up in all? =
  10. 10.The price of a bicycle is ₹1300. It goes up by 50%. What is the new price (in ₹)?
  11. 11.A water tank holds 4740 litres. 50% of the water is used. How many litres are left?
  12. 12.A town has 2300 people. Its population grows by 40%. How many people live there now?
  13. 13.The price of a bicycle is ₹1120. It goes up by 40%. What is the new price (in ₹)?
  14. 14.A shop sells 840 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  15. 15.A water tank holds 260 litres. 10% of the water is used. How many litres are left?
  16. 16.A water tank holds 2320 litres. 40% of the water is used. How many litres are left?
  17. 17.A water tank holds 960 litres. 50% of the water is used. How many litres are left?
  18. 18.A town has 2080 people. Its population grows by 25%. How many people live there now?
  19. 19.A shop sells 120 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  20. 20.A price goes up by 25% and then goes up by 50% more. By what percent has it gone up in all? =
  21. 21.A shop sells 1240 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  22. 22.A price comes down by 20% and then comes down by 50% more. By what percent has it come down in all? =
  23. 23.A water tank holds 820 litres. 20% of the water is used. How many litres are left?
  24. 24.A price comes down by 50% and then comes down by 50% more. By what percent has it come down in all? =
  25. 25.A water tank holds 560 litres. 40% of the water is used. How many litres are left?
  26. 26.The price of a school bag changes from ₹4880 to ₹5856. By what percent did it go up?
  27. 27.A water tank holds 3320 litres. 10% of the water is used. How many litres are left?
  28. 28.The price of a school bag changes from ₹980 to ₹784. By what percent did it come down?
  29. 29.The price of a school bag changes from ₹2960 to ₹4144. By what percent did it go up?
  30. 30.A water tank holds 4540 litres. 20% of the water is used. How many litres are left?
  31. 31.The price of a school bag changes from ₹2900 to ₹1740. By what percent did it come down?
  32. 32.A price goes up by 50% and then goes up by 5% more. By what percent has it gone up in all? =
  33. 33.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  34. 34.The price of a bicycle is ₹1380. It goes up by 5%. What is the new price (in ₹)?
  35. 35.The price of a school bag changes from ₹3060 to ₹2295. By what percent did it come down?
  36. 36.The price of a school bag changes from ₹1580 to ₹1185. By what percent did it come down?
  37. 37.A water tank holds 1120 litres. 15% of the water is used. How many litres are left?
  38. 38.A price comes down by 40% and then comes down by 25% more. By what percent has it come down in all? =
  39. 39.A town has 860 people. Its population grows by 20%. How many people live there now?
  40. 40.The price of a school bag changes from ₹1780 to ₹1246. By what percent did it come down?

Answer key

  1. 20.75
  2. 50
  3. 2412
  4. 693
  5. 780
  6. 8
  7. 35
  8. 50
  9. 75
  10. 1950
  11. 2370
  12. 3220
  13. 1568
  14. 1176
  15. 234
  16. 1392
  17. 480
  18. 2600
  19. 126
  20. 87.5
  21. 1302
  22. 60
  23. 656
  24. 75
  25. 336
  26. 20
  27. 2988
  28. 20
  29. 40
  30. 3632
  31. 40
  32. 57.5
  33. 21
  34. 1449
  35. 25
  36. 25
  37. 952
  38. 55
  39. 1032
  40. 30

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