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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 668 · 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.The price of a school bag changes from ₹1360 to ₹1224. By what percent did it come down?
  3. 3.A shop sells 4680 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  4. 4.The price of a bicycle is ₹1780. It goes up by 15%. What is the new price (in ₹)?
  5. 5.A price goes up by 15% and then comes down by 10%. By what percent has it gone up in all? =
  6. 6.A shop sells 2860 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  7. 7.A shop sells 3660 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  8. 8.A price goes up by 15% and then goes up by 30% more. By what percent has it gone up in all? =
  9. 9.The price of a school bag changes from ₹2700 to ₹2835. By what percent did it go up?
  10. 10.A price comes down by 15% and then comes down by 10% more. By what percent has it come down in all? =
  11. 11.A price comes down by 50% and then comes down by 25% more. By what percent has it come down in all? =
  12. 12.The price of a school bag changes from ₹700 to ₹665. By what percent did it come down?
  13. 13.A water tank holds 1480 litres. 50% of the water is used. How many litres are left?
  14. 14.A water tank holds 3120 litres. 30% of the water is used. How many litres are left?
  15. 15.The price of a school bag changes from ₹1040 to ₹1248. By what percent did it go up?
  16. 16.The price of a school bag changes from ₹3960 to ₹3168. By what percent did it come down?
  17. 17.A town has 4240 people. Its population grows by 40%. How many people live there now?
  18. 18.A town has 2620 people. Its population grows by 10%. How many people live there now?
  19. 19.A water tank holds 4820 litres. 20% of the water is used. How many litres are left?
  20. 20.A price comes down by 40% and then comes down by 50% more. By what percent has it come down in all? =
  21. 21.A water tank holds 720 litres. 10% of the water is used. How many litres are left?
  22. 22.A price comes down by 30% and then comes down by 5% more. By what percent has it come down in all? =
  23. 23.A price comes down by 40% and then comes down by 5% more. By what percent has it come down in all? =
  24. 24.A price comes down by 15% and then comes down by 20% more. By what percent has it come down in all? =
  25. 25.A water tank holds 3880 litres. 40% of the water is used. How many litres are left?
  26. 26.A town has 4060 people. Its population grows by 30%. How many people live there now?
  27. 27.The price of a school bag changes from ₹1960 to ₹2352. By what percent did it go up?
  28. 28.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  29. 29.The price of a bicycle is ₹2460. It goes up by 15%. What is the new price (in ₹)?
  30. 30.The price of a school bag changes from ₹860 to ₹1290. By what percent did it go up?
  31. 31.A price goes up by 40% and then goes up by 20% more. By what percent has it gone up in all? =
  32. 32.The price of a school bag changes from ₹740 to ₹814. By what percent did it go up?
  33. 33.The price of a school bag changes from ₹4900 to ₹5635. By what percent did it go up?
  34. 34.The price of a school bag changes from ₹860 to ₹903. By what percent did it go up?
  35. 35.A water tank holds 2960 litres. 25% of the water is used. How many litres are left?
  36. 36.A water tank holds 2640 litres. 25% of the water is used. How many litres are left?
  37. 37.The price of a bicycle is ₹3660. It goes up by 5%. What is the new price (in ₹)?
  38. 38.A price goes up by 20% and then goes up by 15% more. By what percent has it gone up in all? =
  39. 39.A water tank holds 480 litres. 25% of the water is used. How many litres are left?
  40. 40.The price of a school bag changes from ₹3920 to ₹4704. By what percent did it go up?

Answer key

  1. 27.5
  2. 10
  3. 5382
  4. 2047
  5. 3.5
  6. 3575
  7. 4392
  8. 49.5
  9. 5
  10. 23.5
  11. 62.5
  12. 5
  13. 740
  14. 2184
  15. 20
  16. 20
  17. 5936
  18. 2882
  19. 3856
  20. 70
  21. 648
  22. 33.5
  23. 43
  24. 32
  25. 2328
  26. 5278
  27. 20
  28. 21
  29. 2829
  30. 50
  31. 68
  32. 10
  33. 15
  34. 5
  35. 2220
  36. 1980
  37. 3843
  38. 38
  39. 360
  40. 20

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