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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 34 · 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 water tank holds 4660 litres. 50% of the water is used. How many litres are left?
  2. 2.A water tank holds 1200 litres. 25% of the water is used. How many litres are left?
  3. 3.A water tank holds 1000 litres. 50% of the water is used. How many litres are left?
  4. 4.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  5. 5.The price of a bicycle is ₹1680. It goes up by 10%. What is the new price (in ₹)?
  6. 6.The price of a bicycle is ₹4300. It goes up by 50%. What is the new price (in ₹)?
  7. 7.A price goes up by 20% and then goes up by 25% more. By what percent has it gone up in all? =
  8. 8.A water tank holds 1420 litres. 20% of the water is used. How many litres are left?
  9. 9.A water tank holds 4140 litres. 15% of the water is used. How many litres are left?
  10. 10.A water tank holds 2920 litres. 10% of the water is used. How many litres are left?
  11. 11.A price comes down by 25% and then comes down by 10% more. By what percent has it come down in all? =
  12. 12.A price goes up by 5% and then goes up by 30% more. By what percent has it gone up in all? =
  13. 13.The price of a school bag changes from ₹4820 to ₹4579. By what percent did it come down?
  14. 14.A water tank holds 600 litres. 40% of the water is used. How many litres are left?
  15. 15.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  16. 16.A price goes up by 15% and then goes up by 10% more. By what percent has it gone up in all? =
  17. 17.A price comes down by 50% and then comes down by 50% more. By what percent has it come down in all? =
  18. 18.A town has 80 people. Its population grows by 25%. How many people live there now?
  19. 19.The price of a school bag changes from ₹2380 to ₹3332. By what percent did it go up?
  20. 20.A price comes down by 5% and then comes down by 20% more. By what percent has it come down in all? =
  21. 21.The price of a bicycle is ₹1220. It goes up by 20%. What is the new price (in ₹)?
  22. 22.The price of a school bag changes from ₹2740 to ₹2055. By what percent did it come down?
  23. 23.A water tank holds 2120 litres. 10% of the water is used. How many litres are left?
  24. 24.A shop sells 3680 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  25. 25.A town has 1800 people. Its population grows by 40%. How many people live there now?
  26. 26.A price goes up by 15% and then goes up by 40% more. By what percent has it gone up in all? =
  27. 27.A price goes up by 50% and then comes down by 5%. By what percent has it gone up in all? =
  28. 28.A shop sells 2160 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  29. 29.A shop sells 520 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  30. 30.A price comes down by 40% and then comes down by 40% more. By what percent has it come down in all? =
  31. 31.A price comes down by 25% and then comes down by 20% more. By what percent has it come down in all? =
  32. 32.A shop sells 1280 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  33. 33.The price of a school bag changes from ₹1160 to ₹870. By what percent did it come down?
  34. 34.The price of a school bag changes from ₹1200 to ₹600. By what percent did it come down?
  35. 35.The price of a bicycle is ₹2860. It goes up by 30%. What is the new price (in ₹)?
  36. 36.A price goes up by 5% and then goes up by 10% more. By what percent has it gone up in all? =
  37. 37.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  38. 38.A town has 2520 people. Its population grows by 40%. How many people live there now?
  39. 39.A water tank holds 2020 litres. 25% of the water is used. How many litres are left?
  40. 40.The price of a bicycle is ₹5000. It goes up by 10%. What is the new price (in ₹)?

Answer key

  1. 2330
  2. 900
  3. 500
  4. 37.5
  5. 1848
  6. 6450
  7. 50
  8. 1136
  9. 3519
  10. 2628
  11. 32.5
  12. 36.5
  13. 5
  14. 360
  15. 37.5
  16. 26.5
  17. 75
  18. 100
  19. 40
  20. 24
  21. 1464
  22. 25
  23. 1908
  24. 5152
  25. 2520
  26. 61
  27. 42.5
  28. 3024
  29. 572
  30. 64
  31. 40
  32. 1920
  33. 25
  34. 50
  35. 3718
  36. 15.5
  37. 21
  38. 3528
  39. 1515
  40. 5500

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