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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 155 · 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 shop sells 2400 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  2. 2.A town has 140 people. Its population grows by 30%. How many people live there now?
  3. 3.A town has 1820 people. Its population grows by 15%. How many people live there now?
  4. 4.A water tank holds 980 litres. 20% of the water is used. How many litres are left?
  5. 5.The price of a bicycle is ₹1260. It goes up by 40%. What is the new price (in ₹)?
  6. 6.A water tank holds 3740 litres. 40% of the water is used. How many litres are left?
  7. 7.A water tank holds 2060 litres. 25% of the water is used. How many litres are left?
  8. 8.The price of a school bag changes from ₹1140 to ₹1311. By what percent did it go up?
  9. 9.The price of a bicycle is ₹1420. It goes up by 20%. What is the new price (in ₹)?
  10. 10.A price goes up by 15% and then comes down by 5%. By what percent has it gone up in all? =
  11. 11.A price comes down by 30% and then comes down by 30% more. By what percent has it come down in all? =
  12. 12.The price of a school bag changes from ₹1760 to ₹2112. By what percent did it go up?
  13. 13.A shop sells 1120 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  14. 14.A price comes down by 30% and then comes down by 10% more. By what percent has it come down in all? =
  15. 15.A price goes up by 40% and then goes up by 25% more. By what percent has it gone up in all? =
  16. 16.A price goes up by 50% and then goes up by 30% more. By what percent has it gone up in all? =
  17. 17.The price of a school bag changes from ₹4200 to ₹4620. By what percent did it go up?
  18. 18.A price goes up by 25% and then goes up by 5% more. By what percent has it gone up in all? =
  19. 19.The price of a school bag changes from ₹1540 to ₹1463. By what percent did it come down?
  20. 20.The price of a bicycle is ₹560. It goes up by 30%. What is the new price (in ₹)?
  21. 21.A price goes up by 10% and then goes up by 20% more. By what percent has it gone up in all? =
  22. 22.A water tank holds 2380 litres. 20% of the water is used. How many litres are left?
  23. 23.A town has 3600 people. Its population grows by 20%. How many people live there now?
  24. 24.A water tank holds 460 litres. 10% of the water is used. How many litres are left?
  25. 25.A water tank holds 3900 litres. 5% of the water is used. How many litres are left?
  26. 26.A town has 1720 people. Its population grows by 15%. How many people live there now?
  27. 27.The price of a bicycle is ₹1700. It goes up by 15%. What is the new price (in ₹)?
  28. 28.A water tank holds 3080 litres. 25% of the water is used. How many litres are left?
  29. 29.A water tank holds 2980 litres. 10% of the water is used. How many litres are left?
  30. 30.The price of a bicycle is ₹2940. It goes up by 30%. What is the new price (in ₹)?
  31. 31.A price comes down by 5% and then comes down by 40% more. By what percent has it come down in all? =
  32. 32.The price of a school bag changes from ₹5000 to ₹4500. By what percent did it come down?
  33. 33.A water tank holds 960 litres. 10% of the water is used. How many litres are left?
  34. 34.The price of a school bag changes from ₹3840 to ₹3648. By what percent did it come down?
  35. 35.The price of a school bag changes from ₹1340 to ₹1273. By what percent did it come down?
  36. 36.The price of a school bag changes from ₹1160 to ₹870. By what percent did it come down?
  37. 37.A price comes down by 5% and then comes down by 20% more. By what percent has it come down in all? =
  38. 38.The price of a school bag changes from ₹1120 to ₹1064. By what percent did it come down?
  39. 39.A water tank holds 640 litres. 25% of the water is used. How many litres are left?
  40. 40.A water tank holds 1140 litres. 5% of the water is used. How many litres are left?

Answer key

  1. 2640
  2. 182
  3. 2093
  4. 784
  5. 1764
  6. 2244
  7. 1545
  8. 15
  9. 1704
  10. 9.25
  11. 51
  12. 20
  13. 1176
  14. 37
  15. 75
  16. 95
  17. 10
  18. 31.25
  19. 5
  20. 728
  21. 32
  22. 1904
  23. 4320
  24. 414
  25. 3705
  26. 1978
  27. 1955
  28. 2310
  29. 2682
  30. 3822
  31. 43
  32. 10
  33. 864
  34. 5
  35. 5
  36. 25
  37. 24
  38. 5
  39. 480
  40. 1083

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