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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 628 · 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.The price of a school bag changes from ₹1500 to ₹1875. By what percent did it go up?
  2. 2.A price goes up by 5% and then goes up by 15% more. By what percent has it gone up in all? =
  3. 3.The price of a school bag changes from ₹1400 to ₹1610. By what percent did it go up?
  4. 4.A shop sells 2740 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  5. 5.The price of a school bag changes from ₹4080 to ₹3264. By what percent did it come down?
  6. 6.A water tank holds 1540 litres. 50% of the water is used. How many litres are left?
  7. 7.A price goes up by 20% and then goes up by 5% more. By what percent has it gone up in all? =
  8. 8.The price of a school bag changes from ₹1280 to ₹1408. By what percent did it go up?
  9. 9.A shop sells 4240 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  10. 10.A water tank holds 640 litres. 25% of the water is used. How many litres are left?
  11. 11.A water tank holds 1200 litres. 15% of the water is used. How many litres are left?
  12. 12.A price comes down by 30% and then comes down by 15% more. By what percent has it come down in all? =
  13. 13.A price goes up by 40% and then goes up by 10% more. By what percent has it gone up in all? =
  14. 14.A shop sells 4220 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  15. 15.The price of a school bag changes from ₹1120 to ₹1232. By what percent did it go up?
  16. 16.A town has 2160 people. Its population grows by 10%. How many people live there now?
  17. 17.A price goes up by 50% and then goes up by 50% more. By what percent has it gone up in all? =
  18. 18.A price comes down by 40% and then comes down by 25% more. By what percent has it come down in all? =
  19. 19.The price of a school bag changes from ₹3380 to ₹5070. By what percent did it go up?
  20. 20.A water tank holds 3520 litres. 40% of the water is used. How many litres are left?
  21. 21.A town has 4640 people. Its population grows by 5%. How many people live there now?
  22. 22.A water tank holds 3540 litres. 5% of the water is used. How many litres are left?
  23. 23.A price comes down by 50% and then comes down by 10% more. By what percent has it come down in all? =
  24. 24.A price comes down by 15% and then comes down by 10% more. By what percent has it come down in all? =
  25. 25.A price comes down by 30% and then comes down by 30% more. By what percent has it come down in all? =
  26. 26.A water tank holds 420 litres. 15% of the water is used. How many litres are left?
  27. 27.A water tank holds 420 litres. 25% of the water is used. How many litres are left?
  28. 28.A price goes up by 40% and then goes up by 15% more. By what percent has it gone up in all? =
  29. 29.A price comes down by 15% and then comes down by 15% more. By what percent has it come down in all? =
  30. 30.A price comes down by 5% and then comes down by 10% more. By what percent has it come down in all? =
  31. 31.A shop sells 2620 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  32. 32.A price goes up by 50% and then comes down by 5%. By what percent has it gone up in all? =
  33. 33.A shop sells 4580 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  34. 34.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =
  35. 35.A town has 3000 people. Its population grows by 40%. How many people live there now?
  36. 36.A price goes up by 30% and then goes up by 5% more. By what percent has it gone up in all? =
  37. 37.The price of a school bag changes from ₹4200 to ₹3150. By what percent did it come down?
  38. 38.A water tank holds 4360 litres. 50% of the water is used. How many litres are left?
  39. 39.A water tank holds 1540 litres. 25% of the water is used. How many litres are left?
  40. 40.A price goes up by 40% and then goes up by 20% more. By what percent has it gone up in all? =

Answer key

  1. 25
  2. 20.75
  3. 15
  4. 3836
  5. 20
  6. 770
  7. 26
  8. 10
  9. 4876
  10. 480
  11. 1020
  12. 40.5
  13. 54
  14. 4431
  15. 10
  16. 2376
  17. 125
  18. 55
  19. 50
  20. 2112
  21. 4872
  22. 3363
  23. 55
  24. 23.5
  25. 51
  26. 357
  27. 315
  28. 61
  29. 27.75
  30. 14.5
  31. 3930
  32. 42.5
  33. 6870
  34. 15.5
  35. 4200
  36. 36.5
  37. 25
  38. 2180
  39. 1155
  40. 68

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