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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 38 · 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 comes down by 5% and then comes down by 30% more. By what percent has it come down in all? =
  2. 2.A water tank holds 4300 litres. 10% of the water is used. How many litres are left?
  3. 3.The price of a school bag changes from ₹2440 to ₹1464. By what percent did it come down?
  4. 4.A town has 3580 people. Its population grows by 40%. How many people live there now?
  5. 5.The price of a school bag changes from ₹1280 to ₹1664. By what percent did it go up?
  6. 6.A price comes down by 50% and then comes down by 20% more. By what percent has it come down in all? =
  7. 7.A water tank holds 4880 litres. 10% of the water is used. How many litres are left?
  8. 8.The price of a bicycle is ₹4180. It goes up by 20%. What is the new price (in ₹)?
  9. 9.A water tank holds 2820 litres. 15% of the water is used. How many litres are left?
  10. 10.A shop sells 1020 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  11. 11.The price of a school bag changes from ₹1000 to ₹750. By what percent did it come down?
  12. 12.A water tank holds 3640 litres. 20% of the water is used. How many litres are left?
  13. 13.The price of a school bag changes from ₹2120 to ₹1696. By what percent did it come down?
  14. 14.The price of a school bag changes from ₹2360 to ₹3304. By what percent did it go up?
  15. 15.A price comes down by 10% and then comes down by 10% more. By what percent has it come down in all? =
  16. 16.A shop sells 3160 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  17. 17.A water tank holds 1540 litres. 25% of the water is used. How many litres are left?
  18. 18.A town has 800 people. Its population grows by 20%. How many people live there now?
  19. 19.A shop sells 4280 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  20. 20.A water tank holds 720 litres. 50% of the water is used. How many litres are left?
  21. 21.A water tank holds 1500 litres. 20% of the water is used. How many litres are left?
  22. 22.The price of a bicycle is ₹3100. It goes up by 15%. What is the new price (in ₹)?
  23. 23.The price of a school bag changes from ₹3140 to ₹2983. By what percent did it come down?
  24. 24.A price comes down by 5% and then comes down by 40% more. By what percent has it come down in all? =
  25. 25.The price of a school bag changes from ₹1060 to ₹742. By what percent did it come down?
  26. 26.The price of a bicycle is ₹700. It goes up by 40%. What is the new price (in ₹)?
  27. 27.A price goes up by 50% and then comes down by 15%. By what percent has it gone up in all? =
  28. 28.The price of a bicycle is ₹1160. It goes up by 25%. What is the new price (in ₹)?
  29. 29.A price comes down by 25% and then comes down by 5% more. By what percent has it come down in all? =
  30. 30.A price comes down by 30% and then comes down by 25% more. By what percent has it come down in all? =
  31. 31.A town has 3180 people. Its population grows by 50%. How many people live there now?
  32. 32.The price of a bicycle is ₹4900. It goes up by 10%. What is the new price (in ₹)?
  33. 33.The price of a school bag changes from ₹880 to ₹1012. By what percent did it go up?
  34. 34.The price of a bicycle is ₹2940. It goes up by 50%. What is the new price (in ₹)?
  35. 35.The price of a school bag changes from ₹1720 to ₹1290. By what percent did it come down?
  36. 36.A water tank holds 700 litres. 30% of the water is used. How many litres are left?
  37. 37.A price goes up by 50% and then goes up by 25% more. By what percent has it gone up in all? =
  38. 38.A town has 3520 people. Its population grows by 40%. How many people live there now?
  39. 39.A price comes down by 10% and then comes down by 30% more. By what percent has it come down in all? =
  40. 40.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =

Answer key

  1. 33.5
  2. 3870
  3. 40
  4. 5012
  5. 30
  6. 60
  7. 4392
  8. 5016
  9. 2397
  10. 1275
  11. 25
  12. 2912
  13. 20
  14. 40
  15. 19
  16. 3318
  17. 1155
  18. 960
  19. 5564
  20. 360
  21. 1200
  22. 3565
  23. 5
  24. 43
  25. 30
  26. 980
  27. 27.5
  28. 1450
  29. 28.75
  30. 47.5
  31. 4770
  32. 5390
  33. 15
  34. 4410
  35. 25
  36. 490
  37. 87.5
  38. 4928
  39. 37
  40. 15.5

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