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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 432 · 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.A town has 3260 people. Its population grows by 40%. How many people live there now?
  3. 3.A water tank holds 3740 litres. 15% of the water is used. How many litres are left?
  4. 4.A price comes down by 25% and then comes down by 25% more. By what percent has it come down in all? =
  5. 5.A price comes down by 5% and then comes down by 10% more. By what percent has it come down in all? =
  6. 6.The price of a school bag changes from ₹2540 to ₹2286. By what percent did it come down?
  7. 7.A shop sells 60 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  8. 8.A price goes up by 30% and then comes down by 15%. By what percent has it gone up in all? =
  9. 9.A water tank holds 2820 litres. 15% of the water is used. How many litres are left?
  10. 10.The price of a school bag changes from ₹1500 to ₹2100. By what percent did it go up?
  11. 11.The price of a school bag changes from ₹340 to ₹170. By what percent did it come down?
  12. 12.A shop sells 3260 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  13. 13.The price of a bicycle is ₹3740. It goes up by 10%. What is the new price (in ₹)?
  14. 14.A town has 2620 people. Its population grows by 40%. How many people live there now?
  15. 15.A water tank holds 1740 litres. 30% of the water is used. How many litres are left?
  16. 16.A water tank holds 400 litres. 40% of the water is used. How many litres are left?
  17. 17.The price of a school bag changes from ₹4900 to ₹3430. By what percent did it come down?
  18. 18.A water tank holds 1800 litres. 25% of the water is used. How many litres are left?
  19. 19.A price goes up by 15% and then goes up by 30% more. By what percent has it gone up in all? =
  20. 20.A town has 4660 people. Its population grows by 25%. How many people live there now?
  21. 21.A price goes up by 15% and then comes down by 5%. By what percent has it gone up in all? =
  22. 22.The price of a bicycle is ₹1360. It goes up by 5%. What is the new price (in ₹)?
  23. 23.A water tank holds 2200 litres. 30% of the water is used. How many litres are left?
  24. 24.A price comes down by 30% and then comes down by 15% more. By what percent has it come down in all? =
  25. 25.The price of a school bag changes from ₹2700 to ₹3510. By what percent did it go up?
  26. 26.A shop sells 2040 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  27. 27.A water tank holds 260 litres. 30% of the water is used. How many litres are left?
  28. 28.The price of a bicycle is ₹1740. It goes up by 10%. What is the new price (in ₹)?
  29. 29.A water tank holds 1940 litres. 5% of the water is used. How many litres are left?
  30. 30.The price of a bicycle is ₹620. It goes up by 20%. What is the new price (in ₹)?
  31. 31.A price comes down by 50% and then comes down by 20% more. By what percent has it come down in all? =
  32. 32.The price of a school bag changes from ₹1080 to ₹1026. By what percent did it come down?
  33. 33.A town has 1480 people. Its population grows by 30%. How many people live there now?
  34. 34.A town has 1700 people. Its population grows by 50%. How many people live there now?
  35. 35.A water tank holds 900 litres. 25% of the water is used. How many litres are left?
  36. 36.The price of a school bag changes from ₹1240 to ₹1736. By what percent did it go up?
  37. 37.A price goes up by 30% and then goes up by 50% more. By what percent has it gone up in all? =
  38. 38.A town has 4980 people. Its population grows by 10%. How many people live there now?
  39. 39.A town has 640 people. Its population grows by 50%. How many people live there now?
  40. 40.The price of a bicycle is ₹4740. It goes up by 25%. What is the new price (in ₹)?

Answer key

  1. 20.75
  2. 4564
  3. 3179
  4. 43.75
  5. 14.5
  6. 10
  7. 75
  8. 10.5
  9. 2397
  10. 40
  11. 50
  12. 3912
  13. 4114
  14. 3668
  15. 1218
  16. 240
  17. 30
  18. 1350
  19. 49.5
  20. 5825
  21. 9.25
  22. 1428
  23. 1540
  24. 40.5
  25. 30
  26. 2142
  27. 182
  28. 1914
  29. 1843
  30. 744
  31. 60
  32. 5
  33. 1924
  34. 2550
  35. 675
  36. 40
  37. 95
  38. 5478
  39. 960
  40. 5925

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