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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 244 · 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 3600 litres. 10% of the water is used. How many litres are left?
  2. 2.A shop sells 2140 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  3. 3.The price of a school bag changes from ₹3580 to ₹1790. By what percent did it come down?
  4. 4.The price of a school bag changes from ₹4960 to ₹2480. By what percent did it come down?
  5. 5.The price of a bicycle is ₹2620. It goes up by 50%. What is the new price (in ₹)?
  6. 6.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  7. 7.A price comes down by 30% and then comes down by 50% more. By what percent has it come down in all? =
  8. 8.A shop sells 4660 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  9. 9.A water tank holds 800 litres. 20% of the water is used. How many litres are left?
  10. 10.A water tank holds 960 litres. 30% of the water is used. How many litres are left?
  11. 11.A price goes up by 25% and then comes down by 10%. By what percent has it gone up in all? =
  12. 12.A town has 3720 people. Its population grows by 40%. How many people live there now?
  13. 13.A water tank holds 3720 litres. 20% of the water is used. How many litres are left?
  14. 14.A town has 1880 people. Its population grows by 30%. How many people live there now?
  15. 15.A price goes up by 15% and then goes up by 25% more. By what percent has it gone up in all? =
  16. 16.The price of a bicycle is ₹3840. It goes up by 10%. What is the new price (in ₹)?
  17. 17.The price of a bicycle is ₹3700. It goes up by 10%. What is the new price (in ₹)?
  18. 18.A price comes down by 5% and then comes down by 50% more. By what percent has it come down in all? =
  19. 19.A price goes up by 50% and then goes up by 25% more. By what percent has it gone up in all? =
  20. 20.A water tank holds 3580 litres. 50% of the water is used. How many litres are left?
  21. 21.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  22. 22.A water tank holds 4940 litres. 5% of the water is used. How many litres are left?
  23. 23.The price of a bicycle is ₹2480. It goes up by 15%. What is the new price (in ₹)?
  24. 24.The price of a school bag changes from ₹2940 to ₹1470. By what percent did it come down?
  25. 25.A price goes up by 25% and then comes down by 15%. By what percent has it gone up in all? =
  26. 26.A water tank holds 3500 litres. 15% of the water is used. How many litres are left?
  27. 27.A water tank holds 980 litres. 40% of the water is used. How many litres are left?
  28. 28.A price goes up by 40% and then goes up by 5% more. By what percent has it gone up in all? =
  29. 29.A water tank holds 760 litres. 5% of the water is used. How many litres are left?
  30. 30.The price of a school bag changes from ₹60 to ₹72. By what percent did it go up?
  31. 31.A town has 1560 people. Its population grows by 20%. How many people live there now?
  32. 32.The price of a school bag changes from ₹3500 to ₹4550. By what percent did it go up?
  33. 33.A shop sells 4080 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  34. 34.A price goes up by 20% and then comes down by 10%. By what percent has it gone up in all? =
  35. 35.A shop sells 1420 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  36. 36.A price goes up by 20% and then goes up by 25% more. By what percent has it gone up in all? =
  37. 37.The price of a school bag changes from ₹3420 to ₹2394. By what percent did it come down?
  38. 38.A shop sells 340 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  39. 39.The price of a bicycle is ₹180. It goes up by 15%. What is the new price (in ₹)?
  40. 40.A price comes down by 10% and then comes down by 5% more. By what percent has it come down in all? =

Answer key

  1. 3240
  2. 2247
  3. 50
  4. 50
  5. 3930
  6. 37.5
  7. 65
  8. 6524
  9. 640
  10. 672
  11. 12.5
  12. 5208
  13. 2976
  14. 2444
  15. 43.75
  16. 4224
  17. 4070
  18. 52.5
  19. 87.5
  20. 1790
  21. 37.5
  22. 4693
  23. 2852
  24. 50
  25. 6.25
  26. 2975
  27. 588
  28. 47
  29. 722
  30. 20
  31. 1872
  32. 30
  33. 4488
  34. 8
  35. 1988
  36. 50
  37. 30
  38. 442
  39. 207
  40. 14.5

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