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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 645 · 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 comes down by 30% and then comes down by 30% more. By what percent has it come down in all? =
  2. 2.A water tank holds 3540 litres. 10% of the water is used. How many litres are left?
  3. 3.A water tank holds 840 litres. 10% of the water is used. How many litres are left?
  4. 4.A town has 1840 people. Its population grows by 20%. How many people live there now?
  5. 5.A price comes down by 15% and then comes down by 40% more. By what percent has it come down in all? =
  6. 6.A town has 2460 people. Its population grows by 40%. How many people live there now?
  7. 7.A water tank holds 3160 litres. 25% of the water is used. How many litres are left?
  8. 8.A water tank holds 1980 litres. 40% of the water is used. How many litres are left?
  9. 9.The price of a bicycle is ₹2540. It goes up by 30%. What is the new price (in ₹)?
  10. 10.A water tank holds 640 litres. 5% of the water is used. How many litres are left?
  11. 11.The price of a school bag changes from ₹3520 to ₹1760. By what percent did it come down?
  12. 12.The price of a school bag changes from ₹1200 to ₹1260. By what percent did it go up?
  13. 13.A shop sells 360 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  14. 14.A price comes down by 15% and then comes down by 20% more. By what percent has it come down in all? =
  15. 15.A price goes up by 20% and then goes up by 40% more. By what percent has it gone up in all? =
  16. 16.The price of a school bag changes from ₹1980 to ₹2574. By what percent did it go up?
  17. 17.The price of a school bag changes from ₹2660 to ₹2926. By what percent did it go up?
  18. 18.A water tank holds 4300 litres. 5% of the water is used. How many litres are left?
  19. 19.A water tank holds 2460 litres. 30% of the water is used. How many litres are left?
  20. 20.The price of a school bag changes from ₹300 to ₹315. By what percent did it go up?
  21. 21.A price goes up by 25% and then comes down by 5%. By what percent has it gone up in all? =
  22. 22.A water tank holds 3220 litres. 25% of the water is used. How many litres are left?
  23. 23.A shop sells 2560 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  24. 24.A price comes down by 10% and then comes down by 5% more. By what percent has it come down in all? =
  25. 25.A water tank holds 2800 litres. 5% of the water is used. How many litres are left?
  26. 26.The price of a school bag changes from ₹2500 to ₹3500. By what percent did it go up?
  27. 27.The price of a bicycle is ₹1920. It goes up by 10%. What is the new price (in ₹)?
  28. 28.A town has 4260 people. Its population grows by 5%. How many people live there now?
  29. 29.A price goes up by 30% and then goes up by 5% more. By what percent has it gone up in all? =
  30. 30.A water tank holds 1960 litres. 5% of the water is used. How many litres are left?
  31. 31.The price of a school bag changes from ₹920 to ₹736. By what percent did it come down?
  32. 32.The price of a bicycle is ₹1880. It goes up by 10%. What is the new price (in ₹)?
  33. 33.The price of a school bag changes from ₹2980 to ₹2086. By what percent did it come down?
  34. 34.The price of a school bag changes from ₹2980 to ₹3874. By what percent did it go up?
  35. 35.A water tank holds 1160 litres. 20% of the water is used. How many litres are left?
  36. 36.A shop sells 280 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  37. 37.The price of a bicycle is ₹3480. It goes up by 5%. What is the new price (in ₹)?
  38. 38.A shop sells 1120 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  39. 39.The price of a school bag changes from ₹1200 to ₹1680. By what percent did it go up?
  40. 40.A price comes down by 10% and then comes down by 20% more. By what percent has it come down in all? =

Answer key

  1. 51
  2. 3186
  3. 756
  4. 2208
  5. 49
  6. 3444
  7. 2370
  8. 1188
  9. 3302
  10. 608
  11. 50
  12. 5
  13. 396
  14. 32
  15. 68
  16. 30
  17. 10
  18. 4085
  19. 1722
  20. 5
  21. 18.75
  22. 2415
  23. 2688
  24. 14.5
  25. 2660
  26. 40
  27. 2112
  28. 4473
  29. 36.5
  30. 1862
  31. 20
  32. 2068
  33. 30
  34. 30
  35. 928
  36. 294
  37. 3654
  38. 1456
  39. 40
  40. 28

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