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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 616 · 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 town has 4780 people. Its population grows by 25%. How many people live there now?
  2. 2.A town has 2580 people. Its population grows by 15%. How many people live there now?
  3. 3.A price goes up by 25% and then comes down by 10%. By what percent has it gone up in all? =
  4. 4.A water tank holds 2520 litres. 10% of the water is used. How many litres are left?
  5. 5.A price goes up by 50% and then comes down by 10%. By what percent has it gone up in all? =
  6. 6.A water tank holds 3080 litres. 30% of the water is used. How many litres are left?
  7. 7.A water tank holds 340 litres. 15% of the water is used. How many litres are left?
  8. 8.The price of a bicycle is ₹2920. It goes up by 10%. What is the new price (in ₹)?
  9. 9.A shop sells 2380 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  10. 10.A water tank holds 840 litres. 40% of the water is used. How many litres are left?
  11. 11.The price of a bicycle is ₹80. It goes up by 25%. What is the new price (in ₹)?
  12. 12.A price comes down by 25% and then comes down by 15% more. By what percent has it come down in all? =
  13. 13.A price comes down by 10% and then comes down by 40% more. By what percent has it come down in all? =
  14. 14.A town has 1560 people. Its population grows by 15%. How many people live there now?
  15. 15.A price comes down by 40% and then comes down by 50% more. By what percent has it come down in all? =
  16. 16.A water tank holds 1320 litres. 15% of the water is used. How many litres are left?
  17. 17.The price of a bicycle is ₹520. It goes up by 25%. What is the new price (in ₹)?
  18. 18.A town has 3260 people. Its population grows by 40%. How many people live there now?
  19. 19.The price of a school bag changes from ₹820 to ₹861. By what percent did it go up?
  20. 20.A town has 4520 people. Its population grows by 5%. How many people live there now?
  21. 21.A shop sells 4240 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  22. 22.The price of a school bag changes from ₹1640 to ₹2050. By what percent did it go up?
  23. 23.A price goes up by 30% and then goes up by 40% more. By what percent has it gone up in all? =
  24. 24.A water tank holds 4440 litres. 30% of the water is used. How many litres are left?
  25. 25.The price of a bicycle is ₹3580. It goes up by 25%. What is the new price (in ₹)?
  26. 26.A price goes up by 40% and then goes up by 25% more. By what percent has it gone up in all? =
  27. 27.A shop sells 1100 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  28. 28.A water tank holds 1740 litres. 20% of the water is used. How many litres are left?
  29. 29.The price of a bicycle is ₹2160. It goes up by 50%. What is the new price (in ₹)?
  30. 30.A price goes up by 20% and then goes up by 30% more. By what percent has it gone up in all? =
  31. 31.A price goes up by 25% and then goes up by 40% more. By what percent has it gone up in all? =
  32. 32.A price comes down by 15% and then comes down by 15% more. By what percent has it come down in all? =
  33. 33.A town has 1900 people. Its population grows by 15%. How many people live there now?
  34. 34.A price goes up by 50% and then comes down by 20%. By what percent has it gone up in all? =
  35. 35.A water tank holds 3220 litres. 25% of the water is used. How many litres are left?
  36. 36.A water tank holds 1140 litres. 15% of the water is used. How many litres are left?
  37. 37.The price of a school bag changes from ₹4380 to ₹3285. By what percent did it come down?
  38. 38.The price of a school bag changes from ₹3240 to ₹4860. By what percent did it go up?
  39. 39.A town has 1360 people. Its population grows by 5%. How many people live there now?
  40. 40.The price of a school bag changes from ₹4840 to ₹2420. By what percent did it come down?

Answer key

  1. 5975
  2. 2967
  3. 12.5
  4. 2268
  5. 35
  6. 2156
  7. 289
  8. 3212
  9. 3332
  10. 504
  11. 100
  12. 36.25
  13. 46
  14. 1794
  15. 70
  16. 1122
  17. 650
  18. 4564
  19. 5
  20. 4746
  21. 5936
  22. 25
  23. 82
  24. 3108
  25. 4475
  26. 75
  27. 1265
  28. 1392
  29. 3240
  30. 56
  31. 75
  32. 27.75
  33. 2185
  34. 20
  35. 2415
  36. 969
  37. 25
  38. 50
  39. 1428
  40. 50

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