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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 372 · 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 2000 litres. 10% of the water is used. How many litres are left?
  2. 2.A price comes down by 5% and then comes down by 10% more. By what percent has it come down in all? =
  3. 3.A water tank holds 4100 litres. 10% of the water is used. How many litres are left?
  4. 4.The price of a school bag changes from ₹2080 to ₹1040. By what percent did it come down?
  5. 5.The price of a bicycle is ₹2740. It goes up by 5%. What is the new price (in ₹)?
  6. 6.A shop sells 3460 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  7. 7.A price comes down by 20% and then comes down by 30% more. By what percent has it come down in all? =
  8. 8.A town has 760 people. Its population grows by 15%. How many people live there now?
  9. 9.A price goes up by 5% and then goes up by 10% more. By what percent has it gone up in all? =
  10. 10.The price of a bicycle is ₹3080. It goes up by 25%. What is the new price (in ₹)?
  11. 11.A shop sells 2200 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  12. 12.A price goes up by 30% and then comes down by 5%. By what percent has it gone up in all? =
  13. 13.A price goes up by 15% and then goes up by 10% more. By what percent has it gone up in all? =
  14. 14.A water tank holds 2220 litres. 50% of the water is used. How many litres are left?
  15. 15.The price of a school bag changes from ₹2380 to ₹2142. By what percent did it come down?
  16. 16.A price goes up by 20% and then goes up by 5% more. By what percent has it gone up in all? =
  17. 17.A price goes up by 40% and then goes up by 5% more. By what percent has it gone up in all? =
  18. 18.The price of a bicycle is ₹3660. It goes up by 20%. What is the new price (in ₹)?
  19. 19.The price of a bicycle is ₹540. It goes up by 10%. What is the new price (in ₹)?
  20. 20.A price comes down by 20% and then comes down by 40% more. By what percent has it come down in all? =
  21. 21.A water tank holds 1820 litres. 20% of the water is used. How many litres are left?
  22. 22.A shop sells 320 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  23. 23.A price goes up by 40% and then goes up by 20% more. By what percent has it gone up in all? =
  24. 24.A water tank holds 440 litres. 10% of the water is used. How many litres are left?
  25. 25.The price of a school bag changes from ₹4800 to ₹2400. By what percent did it come down?
  26. 26.The price of a school bag changes from ₹3820 to ₹2865. By what percent did it come down?
  27. 27.A town has 2060 people. Its population grows by 15%. How many people live there now?
  28. 28.A water tank holds 4100 litres. 30% of the water is used. How many litres are left?
  29. 29.The price of a school bag changes from ₹480 to ₹720. By what percent did it go up?
  30. 30.A price goes up by 10% and then goes up by 50% more. By what percent has it gone up in all? =
  31. 31.The price of a bicycle is ₹4680. It goes up by 10%. What is the new price (in ₹)?
  32. 32.The price of a school bag changes from ₹2540 to ₹3810. By what percent did it go up?
  33. 33.The price of a school bag changes from ₹1880 to ₹1504. By what percent did it come down?
  34. 34.A water tank holds 3960 litres. 25% of the water is used. How many litres are left?
  35. 35.A water tank holds 1620 litres. 5% of the water is used. How many litres are left?
  36. 36.The price of a school bag changes from ₹2220 to ₹3330. By what percent did it go up?
  37. 37.A price goes up by 50% and then comes down by 10%. By what percent has it gone up in all? =
  38. 38.A town has 2280 people. Its population grows by 20%. How many people live there now?
  39. 39.The price of a school bag changes from ₹180 to ₹135. By what percent did it come down?
  40. 40.A price comes down by 30% and then comes down by 25% more. By what percent has it come down in all? =

Answer key

  1. 1800
  2. 14.5
  3. 3690
  4. 50
  5. 2877
  6. 4325
  7. 44
  8. 874
  9. 15.5
  10. 3850
  11. 2530
  12. 23.5
  13. 26.5
  14. 1110
  15. 10
  16. 26
  17. 47
  18. 4392
  19. 594
  20. 52
  21. 1456
  22. 336
  23. 68
  24. 396
  25. 50
  26. 25
  27. 2369
  28. 2870
  29. 50
  30. 65
  31. 5148
  32. 50
  33. 20
  34. 2970
  35. 1539
  36. 50
  37. 35
  38. 2736
  39. 25
  40. 47.5

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