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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 334 · 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 goes up by 30% and then goes up by 30% more. By what percent has it gone up in all? =
  2. 2.The price of a bicycle is ₹940. It goes up by 15%. What is the new price (in ₹)?
  3. 3.A price goes up by 5% and then goes up by 5% more. By what percent has it gone up in all? =
  4. 4.A price goes up by 40% and then goes up by 30% more. By what percent has it gone up in all? =
  5. 5.The price of a school bag changes from ₹4360 to ₹3924. By what percent did it come down?
  6. 6.The price of a school bag changes from ₹1800 to ₹900. By what percent did it come down?
  7. 7.A town has 1180 people. Its population grows by 15%. How many people live there now?
  8. 8.A price goes up by 10% and then comes down by 5%. By what percent has it gone up in all? =
  9. 9.A price comes down by 5% and then comes down by 20% more. By what percent has it come down in all? =
  10. 10.The price of a school bag changes from ₹3740 to ₹3179. By what percent did it come down?
  11. 11.A price goes up by 50% and then goes up by 15% more. By what percent has it gone up in all? =
  12. 12.A water tank holds 260 litres. 40% of the water is used. How many litres are left?
  13. 13.A price goes up by 15% and then comes down by 10%. By what percent has it gone up in all? =
  14. 14.A water tank holds 4780 litres. 40% of the water is used. How many litres are left?
  15. 15.The price of a school bag changes from ₹4580 to ₹5496. By what percent did it go up?
  16. 16.A shop sells 400 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  17. 17.A price comes down by 50% and then comes down by 20% more. By what percent has it come down in all? =
  18. 18.A shop sells 4780 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  19. 19.A water tank holds 4620 litres. 10% of the water is used. How many litres are left?
  20. 20.The price of a school bag changes from ₹1200 to ₹840. By what percent did it come down?
  21. 21.A water tank holds 1740 litres. 20% of the water is used. How many litres are left?
  22. 22.A price goes up by 15% and then goes up by 40% more. By what percent has it gone up in all? =
  23. 23.The price of a bicycle is ₹4680. It goes up by 10%. What is the new price (in ₹)?
  24. 24.A water tank holds 1940 litres. 40% of the water is used. How many litres are left?
  25. 25.The price of a bicycle is ₹2740. It goes up by 25%. What is the new price (in ₹)?
  26. 26.A water tank holds 2880 litres. 40% of the water is used. How many litres are left?
  27. 27.A water tank holds 3600 litres. 50% of the water is used. How many litres are left?
  28. 28.The price of a bicycle is ₹4400. It goes up by 50%. What is the new price (in ₹)?
  29. 29.A water tank holds 1100 litres. 40% of the water is used. How many litres are left?
  30. 30.A water tank holds 160 litres. 40% of the water is used. How many litres are left?
  31. 31.A water tank holds 3940 litres. 15% of the water is used. How many litres are left?
  32. 32.The price of a school bag changes from ₹120 to ₹114. By what percent did it come down?
  33. 33.A water tank holds 3300 litres. 20% of the water is used. How many litres are left?
  34. 34.A price comes down by 15% and then comes down by 25% more. By what percent has it come down in all? =
  35. 35.A price comes down by 30% and then comes down by 20% more. By what percent has it come down in all? =
  36. 36.A water tank holds 1020 litres. 10% of the water is used. How many litres are left?
  37. 37.The price of a school bag changes from ₹1260 to ₹1449. By what percent did it go up?
  38. 38.A water tank holds 1640 litres. 15% of the water is used. How many litres are left?
  39. 39.A town has 520 people. Its population grows by 50%. How many people live there now?
  40. 40.A water tank holds 1480 litres. 30% of the water is used. How many litres are left?

Answer key

  1. 69
  2. 1081
  3. 10.25
  4. 82
  5. 10
  6. 50
  7. 1357
  8. 4.5
  9. 24
  10. 15
  11. 72.5
  12. 156
  13. 3.5
  14. 2868
  15. 20
  16. 420
  17. 60
  18. 5975
  19. 4158
  20. 30
  21. 1392
  22. 61
  23. 5148
  24. 1164
  25. 3425
  26. 1728
  27. 1800
  28. 6600
  29. 660
  30. 96
  31. 3349
  32. 5
  33. 2640
  34. 36.25
  35. 44
  36. 918
  37. 15
  38. 1394
  39. 780
  40. 1036

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