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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 909 · 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.The price of a school bag changes from ₹3340 to ₹4008. By what percent did it go up?
  2. 2.A shop sells 60 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  3. 3.The price of a bicycle is ₹2600. It goes up by 25%. What is the new price (in ₹)?
  4. 4.A town has 3560 people. Its population grows by 40%. How many people live there now?
  5. 5.The price of a bicycle is ₹4940. It goes up by 10%. What is the new price (in ₹)?
  6. 6.A water tank holds 2780 litres. 10% of the water is used. How many litres are left?
  7. 7.The price of a school bag changes from ₹3100 to ₹1860. By what percent did it come down?
  8. 8.The price of a school bag changes from ₹820 to ₹943. By what percent did it go up?
  9. 9.A shop sells 1740 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  10. 10.A water tank holds 1820 litres. 50% of the water is used. How many litres are left?
  11. 11.A water tank holds 4940 litres. 5% of the water is used. How many litres are left?
  12. 12.The price of a school bag changes from ₹1880 to ₹2068. By what percent did it go up?
  13. 13.A price goes up by 20% and then goes up by 5% more. By what percent has it gone up in all? =
  14. 14.A price comes down by 50% and then comes down by 30% more. By what percent has it come down in all? =
  15. 15.A town has 1980 people. Its population grows by 30%. How many people live there now?
  16. 16.A water tank holds 200 litres. 40% of the water is used. How many litres are left?
  17. 17.A price comes down by 5% and then comes down by 30% more. By what percent has it come down in all? =
  18. 18.A town has 2680 people. Its population grows by 5%. How many people live there now?
  19. 19.A water tank holds 1960 litres. 20% of the water is used. How many litres are left?
  20. 20.A town has 640 people. Its population grows by 20%. How many people live there now?
  21. 21.A town has 4700 people. Its population grows by 5%. How many people live there now?
  22. 22.The price of a school bag changes from ₹1720 to ₹1892. By what percent did it go up?
  23. 23.A town has 4320 people. Its population grows by 20%. How many people live there now?
  24. 24.The price of a school bag changes from ₹880 to ₹836. By what percent did it come down?
  25. 25.A price goes up by 50% and then comes down by 10%. By what percent has it gone up in all? =
  26. 26.A price comes down by 5% and then comes down by 20% more. By what percent has it come down in all? =
  27. 27.The price of a bicycle is ₹1620. It goes up by 5%. What is the new price (in ₹)?
  28. 28.A price goes up by 15% and then goes up by 15% more. By what percent has it gone up in all? =
  29. 29.A water tank holds 980 litres. 40% of the water is used. How many litres are left?
  30. 30.A shop sells 1680 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  31. 31.A price comes down by 15% and then comes down by 15% more. By what percent has it come down in all? =
  32. 32.A water tank holds 4860 litres. 50% of the water is used. How many litres are left?
  33. 33.A price goes up by 30% and then goes up by 25% more. By what percent has it gone up in all? =
  34. 34.A shop sells 480 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  35. 35.A price goes up by 5% and then goes up by 20% more. By what percent has it gone up in all? =
  36. 36.A water tank holds 1300 litres. 30% of the water is used. How many litres are left?
  37. 37.The price of a school bag changes from ₹2700 to ₹2565. By what percent did it come down?
  38. 38.The price of a school bag changes from ₹3220 to ₹2898. By what percent did it come down?
  39. 39.The price of a bicycle is ₹1000. It goes up by 15%. What is the new price (in ₹)?
  40. 40.The price of a school bag changes from ₹4460 to ₹5575. By what percent did it go up?

Answer key

  1. 20
  2. 72
  3. 3250
  4. 4984
  5. 5434
  6. 2502
  7. 40
  8. 15
  9. 2262
  10. 910
  11. 4693
  12. 10
  13. 26
  14. 65
  15. 2574
  16. 120
  17. 33.5
  18. 2814
  19. 1568
  20. 768
  21. 4935
  22. 10
  23. 5184
  24. 5
  25. 35
  26. 24
  27. 1701
  28. 32.25
  29. 588
  30. 2352
  31. 27.75
  32. 2430
  33. 62.5
  34. 720
  35. 26
  36. 910
  37. 5
  38. 10
  39. 1150
  40. 25

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