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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 970 · 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 comes down by 5%. By what percent has it gone up in all? =
  2. 2.The price of a school bag changes from ₹3440 to ₹3956. By what percent did it go up?
  3. 3.A town has 760 people. Its population grows by 50%. How many people live there now?
  4. 4.The price of a school bag changes from ₹1180 to ₹944. By what percent did it come down?
  5. 5.A price goes up by 50% and then goes up by 20% more. By what percent has it gone up in all? =
  6. 6.The price of a school bag changes from ₹4060 to ₹4263. By what percent did it go up?
  7. 7.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  8. 8.A town has 3620 people. Its population grows by 20%. How many people live there now?
  9. 9.A shop sells 4400 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  10. 10.The price of a school bag changes from ₹4680 to ₹3744. By what percent did it come down?
  11. 11.A water tank holds 900 litres. 15% of the water is used. How many litres are left?
  12. 12.The price of a school bag changes from ₹5000 to ₹5750. By what percent did it go up?
  13. 13.The price of a school bag changes from ₹1980 to ₹1683. By what percent did it come down?
  14. 14.A water tank holds 3200 litres. 30% of the water is used. How many litres are left?
  15. 15.A town has 2320 people. Its population grows by 5%. How many people live there now?
  16. 16.The price of a bicycle is ₹1480. It goes up by 40%. What is the new price (in ₹)?
  17. 17.The price of a school bag changes from ₹3100 to ₹3565. By what percent did it go up?
  18. 18.The price of a school bag changes from ₹4720 to ₹5900. By what percent did it go up?
  19. 19.A water tank holds 200 litres. 5% of the water is used. How many litres are left?
  20. 20.A water tank holds 1300 litres. 15% of the water is used. How many litres are left?
  21. 21.A price comes down by 50% and then comes down by 25% more. By what percent has it come down in all? =
  22. 22.The price of a bicycle is ₹820. It goes up by 25%. What is the new price (in ₹)?
  23. 23.The price of a bicycle is ₹280. It goes up by 50%. What is the new price (in ₹)?
  24. 24.A water tank holds 1020 litres. 10% of the water is used. How many litres are left?
  25. 25.A price goes up by 15% and then goes up by 15% more. By what percent has it gone up in all? =
  26. 26.A price goes up by 5% and then goes up by 40% more. By what percent has it gone up in all? =
  27. 27.A water tank holds 540 litres. 40% of the water is used. How many litres are left?
  28. 28.The price of a bicycle is ₹760. It goes up by 30%. What is the new price (in ₹)?
  29. 29.The price of a school bag changes from ₹1180 to ₹1003. By what percent did it come down?
  30. 30.A water tank holds 2460 litres. 15% of the water is used. How many litres are left?
  31. 31.A price goes up by 5% and then goes up by 30% more. By what percent has it gone up in all? =
  32. 32.The price of a bicycle is ₹2200. It goes up by 20%. What is the new price (in ₹)?
  33. 33.A town has 1980 people. Its population grows by 50%. How many people live there now?
  34. 34.A water tank holds 4860 litres. 25% of the water is used. How many litres are left?
  35. 35.The price of a school bag changes from ₹3340 to ₹4676. By what percent did it go up?
  36. 36.A water tank holds 1000 litres. 10% of the water is used. How many litres are left?
  37. 37.The price of a school bag changes from ₹1220 to ₹1037. By what percent did it come down?
  38. 38.A water tank holds 3460 litres. 30% of the water is used. How many litres are left?
  39. 39.A shop sells 2020 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  40. 40.A price goes up by 40% and then goes up by 25% more. By what percent has it gone up in all? =

Answer key

  1. 9.25
  2. 15
  3. 1140
  4. 20
  5. 80
  6. 5
  7. 21
  8. 4344
  9. 5720
  10. 20
  11. 765
  12. 15
  13. 15
  14. 2240
  15. 2436
  16. 2072
  17. 15
  18. 25
  19. 190
  20. 1105
  21. 62.5
  22. 1025
  23. 420
  24. 918
  25. 32.25
  26. 47
  27. 324
  28. 988
  29. 15
  30. 2091
  31. 36.5
  32. 2640
  33. 2970
  34. 3645
  35. 40
  36. 900
  37. 15
  38. 2422
  39. 2828
  40. 75

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