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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 336 · 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 10% more. By what percent has it come down in all? =
  2. 2.A water tank holds 3920 litres. 15% of the water is used. How many litres are left?
  3. 3.The price of a bicycle is ₹3580. It goes up by 25%. What is the new price (in ₹)?
  4. 4.A water tank holds 2640 litres. 50% of the water is used. How many litres are left?
  5. 5.A water tank holds 360 litres. 5% of the water is used. How many litres are left?
  6. 6.A price goes up by 5% and then goes up by 10% more. By what percent has it gone up in all? =
  7. 7.A town has 2300 people. Its population grows by 25%. How many people live there now?
  8. 8.A price comes down by 15% and then comes down by 25% more. By what percent has it come down in all? =
  9. 9.The price of a bicycle is ₹240. It goes up by 25%. What is the new price (in ₹)?
  10. 10.A town has 3380 people. Its population grows by 15%. How many people live there now?
  11. 11.A shop sells 2320 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  12. 12.A town has 780 people. Its population grows by 30%. How many people live there now?
  13. 13.The price of a school bag changes from ₹2540 to ₹3302. By what percent did it go up?
  14. 14.A price goes up by 40% and then comes down by 5%. By what percent has it gone up in all? =
  15. 15.A water tank holds 980 litres. 25% of the water is used. How many litres are left?
  16. 16.A water tank holds 3680 litres. 40% of the water is used. How many litres are left?
  17. 17.A price goes up by 20% and then goes up by 5% more. By what percent has it gone up in all? =
  18. 18.A water tank holds 3800 litres. 15% of the water is used. How many litres are left?
  19. 19.A water tank holds 4020 litres. 30% of the water is used. How many litres are left?
  20. 20.A price goes up by 10% and then comes down by 5%. By what percent has it gone up in all? =
  21. 21.A price comes down by 15% and then comes down by 50% more. By what percent has it come down in all? =
  22. 22.A water tank holds 1540 litres. 30% of the water is used. How many litres are left?
  23. 23.A water tank holds 1960 litres. 20% of the water is used. How many litres are left?
  24. 24.A price goes up by 40% and then comes down by 20%. By what percent has it gone up in all? =
  25. 25.A shop sells 3960 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  26. 26.A price goes up by 40% and then goes up by 40% more. By what percent has it gone up in all? =
  27. 27.The price of a school bag changes from ₹4040 to ₹5656. By what percent did it go up?
  28. 28.A town has 420 people. Its population grows by 5%. How many people live there now?
  29. 29.A water tank holds 4780 litres. 20% of the water is used. How many litres are left?
  30. 30.A price comes down by 15% and then comes down by 10% more. By what percent has it come down in all? =
  31. 31.A shop sells 480 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  32. 32.A shop sells 3000 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  33. 33.A town has 3840 people. Its population grows by 20%. How many people live there now?
  34. 34.A water tank holds 4000 litres. 30% of the water is used. How many litres are left?
  35. 35.The price of a bicycle is ₹2680. It goes up by 25%. What is the new price (in ₹)?
  36. 36.The price of a bicycle is ₹1200. It goes up by 50%. What is the new price (in ₹)?
  37. 37.A water tank holds 1820 litres. 50% of the water is used. How many litres are left?
  38. 38.A price goes up by 50% and then goes up by 10% more. By what percent has it gone up in all? =
  39. 39.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  40. 40.A price comes down by 50% and then comes down by 10% more. By what percent has it come down in all? =

Answer key

  1. 37
  2. 3332
  3. 4475
  4. 1320
  5. 342
  6. 15.5
  7. 2875
  8. 36.25
  9. 300
  10. 3887
  11. 2900
  12. 1014
  13. 30
  14. 33
  15. 735
  16. 2208
  17. 26
  18. 3230
  19. 2814
  20. 4.5
  21. 57.5
  22. 1078
  23. 1568
  24. 12
  25. 4158
  26. 96
  27. 40
  28. 441
  29. 3824
  30. 23.5
  31. 504
  32. 3150
  33. 4608
  34. 2800
  35. 3350
  36. 1800
  37. 910
  38. 65
  39. 37.5
  40. 55

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