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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 540 · 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 shop sells 2740 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  2. 2.The price of a school bag changes from ₹60 to ₹30. By what percent did it come down?
  3. 3.A water tank holds 4720 litres. 50% of the water is used. How many litres are left?
  4. 4.A price goes up by 50% and then comes down by 20%. By what percent has it gone up in all? =
  5. 5.The price of a school bag changes from ₹480 to ₹408. By what percent did it come down?
  6. 6.A town has 1840 people. Its population grows by 15%. How many people live there now?
  7. 7.A water tank holds 400 litres. 25% of the water is used. How many litres are left?
  8. 8.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
  9. 9.A water tank holds 4560 litres. 30% of the water is used. How many litres are left?
  10. 10.A water tank holds 680 litres. 40% of the water is used. How many litres are left?
  11. 11.A water tank holds 1700 litres. 30% of the water is used. How many litres are left?
  12. 12.A price comes down by 40% and then comes down by 30% more. By what percent has it come down in all? =
  13. 13.A water tank holds 3300 litres. 15% of the water is used. How many litres are left?
  14. 14.A price comes down by 20% and then comes down by 40% more. By what percent has it come down in all? =
  15. 15.A town has 2860 people. Its population grows by 50%. How many people live there now?
  16. 16.A water tank holds 740 litres. 40% of the water is used. How many litres are left?
  17. 17.A price goes up by 20% and then goes up by 10% more. By what percent has it gone up in all? =
  18. 18.The price of a school bag changes from ₹560 to ₹644. By what percent did it go up?
  19. 19.A price goes up by 10% and then goes up by 40% more. By what percent has it gone up in all? =
  20. 20.A water tank holds 3020 litres. 10% of the water is used. How many litres are left?
  21. 21.A water tank holds 300 litres. 50% of the water is used. How many litres are left?
  22. 22.A price goes up by 5% and then goes up by 5% more. By what percent has it gone up in all? =
  23. 23.A water tank holds 1240 litres. 10% of the water is used. How many litres are left?
  24. 24.A water tank holds 3440 litres. 30% of the water is used. How many litres are left?
  25. 25.The price of a school bag changes from ₹3880 to ₹3686. By what percent did it come down?
  26. 26.The price of a school bag changes from ₹100 to ₹60. By what percent did it come down?
  27. 27.A water tank holds 4540 litres. 5% of the water is used. How many litres are left?
  28. 28.A water tank holds 1500 litres. 20% of the water is used. How many litres are left?
  29. 29.A price goes up by 30% and then comes down by 20%. By what percent has it gone up in all? =
  30. 30.A price goes up by 40% and then comes down by 5%. By what percent has it gone up in all? =
  31. 31.A water tank holds 420 litres. 5% of the water is used. How many litres are left?
  32. 32.A price comes down by 40% and then comes down by 40% more. By what percent has it come down in all? =
  33. 33.A price goes up by 15% and then goes up by 30% more. By what percent has it gone up in all? =
  34. 34.A price goes up by 50% and then goes up by 15% more. By what percent has it gone up in all? =
  35. 35.A water tank holds 680 litres. 10% of the water is used. How many litres are left?
  36. 36.A price comes down by 15% and then comes down by 50% more. By what percent has it come down in all? =
  37. 37.A water tank holds 1780 litres. 15% of the water is used. How many litres are left?
  38. 38.A shop sells 1580 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  39. 39.The price of a bicycle is ₹4280. It goes up by 5%. What is the new price (in ₹)?
  40. 40.A price comes down by 10% and then comes down by 10% more. By what percent has it come down in all? =

Answer key

  1. 3425
  2. 50
  3. 2360
  4. 20
  5. 15
  6. 2116
  7. 300
  8. 9.75
  9. 3192
  10. 408
  11. 1190
  12. 58
  13. 2805
  14. 52
  15. 4290
  16. 444
  17. 32
  18. 15
  19. 54
  20. 2718
  21. 150
  22. 10.25
  23. 1116
  24. 2408
  25. 5
  26. 40
  27. 4313
  28. 1200
  29. 4
  30. 33
  31. 399
  32. 64
  33. 49.5
  34. 72.5
  35. 612
  36. 57.5
  37. 1513
  38. 2054
  39. 4494
  40. 19

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