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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 818 · 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.

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  1. 1.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =
  2. 2.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  3. 3.A shop sells 1160 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  4. 4.The price of a school bag changes from ₹740 to ₹703. By what percent did it come down?
  5. 5.A water tank holds 1600 litres. 10% of the water is used. How many litres are left?
  6. 6.A town has 1020 people. Its population grows by 15%. How many people live there now?
  7. 7.A price comes down by 25% and then comes down by 25% more. By what percent has it come down in all? =
  8. 8.A price goes up by 50% and then goes up by 15% more. By what percent has it gone up in all? =
  9. 9.A price goes up by 20% and then comes down by 15%. By what percent has it gone up in all? =
  10. 10.The price of a school bag changes from ₹2660 to ₹3059. By what percent did it go up?
  11. 11.The price of a bicycle is ₹100. It goes up by 25%. What is the new price (in ₹)?
  12. 12.A water tank holds 1720 litres. 15% of the water is used. How many litres are left?
  13. 13.A price goes up by 15% and then comes down by 10%. By what percent has it gone up in all? =
  14. 14.The price of a school bag changes from ₹2800 to ₹4200. By what percent did it go up?
  15. 15.The price of a bicycle is ₹4600. It goes up by 25%. What is the new price (in ₹)?
  16. 16.A price goes up by 50% and then goes up by 25% more. By what percent has it gone up in all? =
  17. 17.A price goes up by 30% and then goes up by 15% more. By what percent has it gone up in all? =
  18. 18.A shop sells 2440 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  19. 19.A shop sells 3380 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  20. 20.A price goes up by 20% and then goes up by 30% more. By what percent has it gone up in all? =
  21. 21.A town has 1920 people. Its population grows by 20%. How many people live there now?
  22. 22.A price comes down by 5% and then comes down by 30% more. By what percent has it come down in all? =
  23. 23.A water tank holds 1800 litres. 50% of the water is used. How many litres are left?
  24. 24.A shop sells 920 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  25. 25.A price comes down by 30% and then comes down by 5% more. By what percent has it come down in all? =
  26. 26.A price comes down by 40% and then comes down by 40% more. By what percent has it come down in all? =
  27. 27.The price of a bicycle is ₹1420. It goes up by 50%. What is the new price (in ₹)?
  28. 28.A shop sells 1240 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  29. 29.A water tank holds 1500 litres. 40% of the water is used. How many litres are left?
  30. 30.A town has 2260 people. Its population grows by 15%. How many people live there now?
  31. 31.A water tank holds 1360 litres. 20% of the water is used. How many litres are left?
  32. 32.The price of a school bag changes from ₹1140 to ₹1197. By what percent did it go up?
  33. 33.The price of a bicycle is ₹80. It goes up by 40%. What is the new price (in ₹)?
  34. 34.The price of a school bag changes from ₹3860 to ₹3667. By what percent did it come down?
  35. 35.A water tank holds 1000 litres. 25% of the water is used. How many litres are left?
  36. 36.A water tank holds 120 litres. 20% of the water is used. How many litres are left?
  37. 37.The price of a bicycle is ₹3420. It goes up by 10%. What is the new price (in ₹)?
  38. 38.A water tank holds 3440 litres. 40% of the water is used. How many litres are left?
  39. 39.A water tank holds 1280 litres. 50% of the water is used. How many litres are left?
  40. 40.The price of a school bag changes from ₹3760 to ₹2256. By what percent did it come down?

Answer key

  1. 37.5
  2. 21
  3. 1392
  4. 5
  5. 1440
  6. 1173
  7. 43.75
  8. 72.5
  9. 2
  10. 15
  11. 125
  12. 1462
  13. 3.5
  14. 50
  15. 5750
  16. 87.5
  17. 49.5
  18. 2684
  19. 4056
  20. 56
  21. 2304
  22. 33.5
  23. 900
  24. 1104
  25. 33.5
  26. 64
  27. 2130
  28. 1488
  29. 900
  30. 2599
  31. 1088
  32. 5
  33. 112
  34. 5
  35. 750
  36. 96
  37. 3762
  38. 2064
  39. 640
  40. 40

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