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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 935 · 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 50% and then comes down by 15%. By what percent has it gone up in all? =
  2. 2.A price goes up by 15% and then comes down by 5%. By what percent has it gone up in all? =
  3. 3.The price of a school bag changes from ₹140 to ₹182. By what percent did it go up?
  4. 4.The price of a bicycle is ₹1460. It goes up by 10%. What is the new price (in ₹)?
  5. 5.The price of a school bag changes from ₹80 to ₹96. By what percent did it go up?
  6. 6.A price comes down by 20% and then comes down by 40% more. By what percent has it come down in all? =
  7. 7.A water tank holds 1580 litres. 5% of the water is used. How many litres are left?
  8. 8.A water tank holds 4620 litres. 50% of the water is used. How many litres are left?
  9. 9.A water tank holds 360 litres. 30% of the water is used. How many litres are left?
  10. 10.A price comes down by 20% and then comes down by 20% more. By what percent has it come down in all? =
  11. 11.The price of a school bag changes from ₹3320 to ₹4980. By what percent did it go up?
  12. 12.The price of a bicycle is ₹4660. It goes up by 50%. What is the new price (in ₹)?
  13. 13.A price goes up by 30% and then goes up by 25% more. By what percent has it gone up in all? =
  14. 14.A water tank holds 3540 litres. 15% of the water is used. How many litres are left?
  15. 15.The price of a bicycle is ₹1680. It goes up by 20%. What is the new price (in ₹)?
  16. 16.A water tank holds 1920 litres. 15% of the water is used. How many litres are left?
  17. 17.A town has 3920 people. Its population grows by 25%. How many people live there now?
  18. 18.The price of a school bag changes from ₹4040 to ₹5656. By what percent did it go up?
  19. 19.A price comes down by 20% and then comes down by 15% more. By what percent has it come down in all? =
  20. 20.A price comes down by 30% and then comes down by 20% more. By what percent has it come down in all? =
  21. 21.A water tank holds 4620 litres. 10% of the water is used. How many litres are left?
  22. 22.The price of a school bag changes from ₹2120 to ₹1590. By what percent did it come down?
  23. 23.A water tank holds 500 litres. 5% of the water is used. How many litres are left?
  24. 24.A town has 2120 people. Its population grows by 10%. How many people live there now?
  25. 25.A water tank holds 3920 litres. 5% of the water is used. How many litres are left?
  26. 26.A shop sells 2200 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  27. 27.A shop sells 1540 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  28. 28.The price of a school bag changes from ₹4200 to ₹3990. By what percent did it come down?
  29. 29.The price of a school bag changes from ₹1200 to ₹720. By what percent did it come down?
  30. 30.The price of a school bag changes from ₹3100 to ₹2170. By what percent did it come down?
  31. 31.The price of a school bag changes from ₹4460 to ₹5798. By what percent did it go up?
  32. 32.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  33. 33.A water tank holds 1240 litres. 50% of the water is used. How many litres are left?
  34. 34.The price of a bicycle is ₹2280. It goes up by 10%. What is the new price (in ₹)?
  35. 35.A shop sells 1020 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  36. 36.A water tank holds 900 litres. 40% of the water is used. How many litres are left?
  37. 37.The price of a school bag changes from ₹400 to ₹420. By what percent did it go up?
  38. 38.The price of a school bag changes from ₹1400 to ₹1680. By what percent did it go up?
  39. 39.The price of a school bag changes from ₹3060 to ₹3978. By what percent did it go up?
  40. 40.A water tank holds 460 litres. 25% of the water is used. How many litres are left?

Answer key

  1. 27.5
  2. 9.25
  3. 30
  4. 1606
  5. 20
  6. 52
  7. 1501
  8. 2310
  9. 252
  10. 36
  11. 50
  12. 6990
  13. 62.5
  14. 3009
  15. 2016
  16. 1632
  17. 4900
  18. 40
  19. 32
  20. 44
  21. 4158
  22. 25
  23. 475
  24. 2332
  25. 3724
  26. 2530
  27. 1771
  28. 5
  29. 40
  30. 30
  31. 30
  32. 37.5
  33. 620
  34. 2508
  35. 1173
  36. 540
  37. 5
  38. 20
  39. 30
  40. 345

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