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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 631 · 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 50% and then comes down by 10% more. By what percent has it come down in all? =
  2. 2.A town has 3860 people. Its population grows by 40%. How many people live there now?
  3. 3.The price of a bicycle is ₹1520. It goes up by 15%. What is the new price (in ₹)?
  4. 4.The price of a school bag changes from ₹1120 to ₹1344. By what percent did it go up?
  5. 5.The price of a school bag changes from ₹3700 to ₹2775. By what percent did it come down?
  6. 6.A price goes up by 15% and then goes up by 10% more. By what percent has it gone up in all? =
  7. 7.A water tank holds 4020 litres. 20% of the water is used. How many litres are left?
  8. 8.The price of a school bag changes from ₹1180 to ₹1534. By what percent did it go up?
  9. 9.A shop sells 3520 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  10. 10.A shop sells 4460 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  11. 11.A water tank holds 600 litres. 20% of the water is used. How many litres are left?
  12. 12.A price goes up by 30% and then goes up by 40% more. By what percent has it gone up in all? =
  13. 13.A water tank holds 4120 litres. 10% of the water is used. How many litres are left?
  14. 14.A shop sells 4860 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  15. 15.The price of a school bag changes from ₹2400 to ₹1440. By what percent did it come down?
  16. 16.A shop sells 1000 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  17. 17.The price of a school bag changes from ₹4180 to ₹4807. By what percent did it go up?
  18. 18.A shop sells 1420 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  19. 19.A shop sells 4920 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  20. 20.A water tank holds 660 litres. 5% of the water is used. How many litres are left?
  21. 21.A price goes up by 15% and then comes down by 5%. By what percent has it gone up in all? =
  22. 22.A price comes down by 20% and then comes down by 25% more. By what percent has it come down in all? =
  23. 23.A water tank holds 1500 litres. 15% of the water is used. How many litres are left?
  24. 24.A price comes down by 10% and then comes down by 20% more. By what percent has it come down in all? =
  25. 25.The price of a school bag changes from ₹320 to ₹416. By what percent did it go up?
  26. 26.The price of a school bag changes from ₹980 to ₹1176. By what percent did it go up?
  27. 27.The price of a bicycle is ₹1120. It goes up by 10%. What is the new price (in ₹)?
  28. 28.A price goes up by 50% and then goes up by 10% more. By what percent has it gone up in all? =
  29. 29.A price goes up by 50% and then goes up by 30% more. By what percent has it gone up in all? =
  30. 30.A water tank holds 100 litres. 5% of the water is used. How many litres are left?
  31. 31.A water tank holds 1140 litres. 25% of the water is used. How many litres are left?
  32. 32.A price goes up by 30% and then comes down by 20%. By what percent has it gone up in all? =
  33. 33.The price of a school bag changes from ₹4460 to ₹3345. By what percent did it come down?
  34. 34.The price of a bicycle is ₹360. It goes up by 20%. What is the new price (in ₹)?
  35. 35.A town has 4540 people. Its population grows by 40%. How many people live there now?
  36. 36.The price of a school bag changes from ₹3480 to ₹2088. By what percent did it come down?
  37. 37.A price goes up by 10% and then goes up by 15% more. By what percent has it gone up in all? =
  38. 38.A town has 2860 people. Its population grows by 10%. How many people live there now?
  39. 39.The price of a school bag changes from ₹3700 to ₹4070. By what percent did it go up?
  40. 40.A water tank holds 4080 litres. 40% of the water is used. How many litres are left?

Answer key

  1. 55
  2. 5404
  3. 1748
  4. 20
  5. 25
  6. 26.5
  7. 3216
  8. 30
  9. 4224
  10. 5129
  11. 480
  12. 82
  13. 3708
  14. 5103
  15. 40
  16. 1500
  17. 15
  18. 1775
  19. 5904
  20. 627
  21. 9.25
  22. 40
  23. 1275
  24. 28
  25. 30
  26. 20
  27. 1232
  28. 65
  29. 95
  30. 95
  31. 855
  32. 4
  33. 25
  34. 432
  35. 6356
  36. 40
  37. 26.5
  38. 3146
  39. 10
  40. 2448

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