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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 608 · 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 1380 litres. 5% of the water is used. How many litres are left?
  2. 2.A price comes down by 30% and then comes down by 5% more. By what percent has it come down in all? =
  3. 3.The price of a school bag changes from ₹4620 to ₹3234. By what percent did it come down?
  4. 4.A water tank holds 2980 litres. 25% of the water is used. How many litres are left?
  5. 5.A town has 1520 people. Its population grows by 5%. How many people live there now?
  6. 6.A town has 1600 people. Its population grows by 40%. How many people live there now?
  7. 7.A town has 720 people. Its population grows by 50%. How many people live there now?
  8. 8.A price goes up by 40% and then goes up by 15% more. By what percent has it gone up in all? =
  9. 9.A water tank holds 1260 litres. 40% of the water is used. How many litres are left?
  10. 10.The price of a bicycle is ₹200. It goes up by 25%. What is the new price (in ₹)?
  11. 11.A water tank holds 4040 litres. 50% of the water is used. How many litres are left?
  12. 12.The price of a bicycle is ₹1580. It goes up by 50%. What is the new price (in ₹)?
  13. 13.A price goes up by 50% and then goes up by 30% more. By what percent has it gone up in all? =
  14. 14.The price of a school bag changes from ₹2640 to ₹2244. By what percent did it come down?
  15. 15.A shop sells 4380 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  16. 16.A price comes down by 25% and then comes down by 50% more. By what percent has it come down in all? =
  17. 17.A water tank holds 880 litres. 50% of the water is used. How many litres are left?
  18. 18.A water tank holds 1580 litres. 30% of the water is used. How many litres are left?
  19. 19.A shop sells 3160 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  20. 20.A price goes up by 50% and then goes up by 10% more. By what percent has it gone up in all? =
  21. 21.The price of a school bag changes from ₹700 to ₹875. By what percent did it go up?
  22. 22.A water tank holds 1160 litres. 40% of the water is used. How many litres are left?
  23. 23.The price of a school bag changes from ₹4700 to ₹4935. By what percent did it go up?
  24. 24.A water tank holds 2540 litres. 5% of the water is used. How many litres are left?
  25. 25.A water tank holds 700 litres. 15% of the water is used. How many litres are left?
  26. 26.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =
  27. 27.A price goes up by 20% and then goes up by 40% more. By what percent has it gone up in all? =
  28. 28.A water tank holds 4860 litres. 50% of the water is used. How many litres are left?
  29. 29.The price of a school bag changes from ₹4480 to ₹5152. By what percent did it go up?
  30. 30.A town has 2260 people. Its population grows by 40%. How many people live there now?
  31. 31.A town has 4720 people. Its population grows by 50%. How many people live there now?
  32. 32.A price comes down by 50% and then comes down by 5% more. By what percent has it come down in all? =
  33. 33.A shop sells 620 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  34. 34.A water tank holds 1400 litres. 40% of the water is used. How many litres are left?
  35. 35.The price of a school bag changes from ₹3320 to ₹1992. By what percent did it come down?
  36. 36.The price of a school bag changes from ₹1020 to ₹1530. By what percent did it go up?
  37. 37.A water tank holds 1640 litres. 40% of the water is used. How many litres are left?
  38. 38.A town has 3480 people. Its population grows by 25%. How many people live there now?
  39. 39.The price of a school bag changes from ₹1160 to ₹1044. By what percent did it come down?
  40. 40.The price of a school bag changes from ₹1080 to ₹1134. By what percent did it go up?

Answer key

  1. 1311
  2. 33.5
  3. 30
  4. 2235
  5. 1596
  6. 2240
  7. 1080
  8. 61
  9. 756
  10. 250
  11. 2020
  12. 2370
  13. 95
  14. 15
  15. 6570
  16. 62.5
  17. 440
  18. 1106
  19. 4108
  20. 65
  21. 25
  22. 696
  23. 5
  24. 2413
  25. 595
  26. 15.5
  27. 68
  28. 2430
  29. 15
  30. 3164
  31. 7080
  32. 52.5
  33. 682
  34. 840
  35. 40
  36. 50
  37. 984
  38. 4350
  39. 10
  40. 5

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