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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 999 · 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 30% and then comes down by 25% more. By what percent has it come down in all? =
  2. 2.A water tank holds 4400 litres. 5% of the water is used. How many litres are left?
  3. 3.A town has 2420 people. Its population grows by 10%. How many people live there now?
  4. 4.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  5. 5.A price goes up by 40% and then goes up by 25% more. By what percent has it gone up in all? =
  6. 6.The price of a school bag changes from ₹4140 to ₹4761. By what percent did it go up?
  7. 7.A price comes down by 50% and then comes down by 20% more. By what percent has it come down in all? =
  8. 8.The price of a school bag changes from ₹560 to ₹448. By what percent did it come down?
  9. 9.The price of a school bag changes from ₹1600 to ₹2000. By what percent did it go up?
  10. 10.A water tank holds 740 litres. 30% of the water is used. How many litres are left?
  11. 11.The price of a bicycle is ₹3420. It goes up by 40%. What is the new price (in ₹)?
  12. 12.The price of a school bag changes from ₹1840 to ₹2760. By what percent did it go up?
  13. 13.A water tank holds 3020 litres. 30% of the water is used. How many litres are left?
  14. 14.The price of a bicycle is ₹1500. It goes up by 5%. What is the new price (in ₹)?
  15. 15.A shop sells 4260 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  16. 16.The price of a school bag changes from ₹1480 to ₹1850. By what percent did it go up?
  17. 17.The price of a school bag changes from ₹3620 to ₹3258. By what percent did it come down?
  18. 18.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  19. 19.A price comes down by 15% and then comes down by 5% more. By what percent has it come down in all? =
  20. 20.A price goes up by 25% and then comes down by 5%. By what percent has it gone up in all? =
  21. 21.The price of a bicycle is ₹920. It goes up by 30%. What is the new price (in ₹)?
  22. 22.A price goes up by 5% and then goes up by 25% more. By what percent has it gone up in all? =
  23. 23.The price of a school bag changes from ₹3680 to ₹4048. By what percent did it go up?
  24. 24.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
  25. 25.A price goes up by 30% and then goes up by 50% more. By what percent has it gone up in all? =
  26. 26.A town has 4760 people. Its population grows by 20%. How many people live there now?
  27. 27.The price of a school bag changes from ₹2060 to ₹1648. By what percent did it come down?
  28. 28.A town has 1140 people. Its population grows by 25%. How many people live there now?
  29. 29.The price of a bicycle is ₹4060. It goes up by 5%. What is the new price (in ₹)?
  30. 30.The price of a bicycle is ₹920. It goes up by 40%. What is the new price (in ₹)?
  31. 31.A water tank holds 4920 litres. 30% of the water is used. How many litres are left?
  32. 32.A price goes up by 50% and then comes down by 10%. By what percent has it gone up in all? =
  33. 33.A price goes up by 40% and then goes up by 30% more. By what percent has it gone up in all? =
  34. 34.A water tank holds 540 litres. 10% of the water is used. How many litres are left?
  35. 35.A shop sells 380 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  36. 36.The price of a school bag changes from ₹500 to ₹250. By what percent did it come down?
  37. 37.A town has 4000 people. Its population grows by 15%. How many people live there now?
  38. 38.A price comes down by 25% and then comes down by 50% more. By what percent has it come down in all? =
  39. 39.A shop sells 3280 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  40. 40.A water tank holds 900 litres. 20% of the water is used. How many litres are left?

Answer key

  1. 47.5
  2. 4180
  3. 2662
  4. 37.5
  5. 75
  6. 15
  7. 60
  8. 20
  9. 25
  10. 518
  11. 4788
  12. 50
  13. 2114
  14. 1575
  15. 4899
  16. 25
  17. 10
  18. 21
  19. 19.25
  20. 18.75
  21. 1196
  22. 31.25
  23. 10
  24. 9.75
  25. 95
  26. 5712
  27. 20
  28. 1425
  29. 4263
  30. 1288
  31. 3444
  32. 35
  33. 82
  34. 486
  35. 475
  36. 50
  37. 4600
  38. 62.5
  39. 3608
  40. 720

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