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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 692 · 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 30%. By what percent has it gone up in all? =
  2. 2.A shop sells 2120 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  3. 3.The price of a school bag changes from ₹2680 to ₹3752. By what percent did it go up?
  4. 4.A water tank holds 3600 litres. 30% of the water is used. How many litres are left?
  5. 5.A water tank holds 1300 litres. 15% of the water is used. How many litres are left?
  6. 6.A town has 4100 people. Its population grows by 40%. How many people live there now?
  7. 7.A price comes down by 10% and then comes down by 30% more. By what percent has it come down in all? =
  8. 8.A water tank holds 300 litres. 5% of the water is used. How many litres are left?
  9. 9.The price of a school bag changes from ₹4240 to ₹5936. By what percent did it go up?
  10. 10.A price goes up by 50% and then goes up by 40% more. By what percent has it gone up in all? =
  11. 11.The price of a school bag changes from ₹4980 to ₹5478. By what percent did it go up?
  12. 12.The price of a school bag changes from ₹1320 to ₹1518. By what percent did it go up?
  13. 13.A water tank holds 120 litres. 30% of the water is used. How many litres are left?
  14. 14.A town has 4960 people. Its population grows by 10%. How many people live there now?
  15. 15.A water tank holds 220 litres. 10% of the water is used. How many litres are left?
  16. 16.The price of a school bag changes from ₹740 to ₹592. By what percent did it come down?
  17. 17.A water tank holds 200 litres. 50% of the water is used. How many litres are left?
  18. 18.A price comes down by 10% and then comes down by 15% more. By what percent has it come down in all? =
  19. 19.A shop sells 3440 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  20. 20.A town has 1220 people. Its population grows by 30%. How many people live there now?
  21. 21.A water tank holds 2160 litres. 30% of the water is used. How many litres are left?
  22. 22.A price comes down by 50% and then comes down by 30% more. By what percent has it come down in all? =
  23. 23.The price of a bicycle is ₹1760. It goes up by 50%. What is the new price (in ₹)?
  24. 24.A water tank holds 2200 litres. 15% of the water is used. How many litres are left?
  25. 25.A water tank holds 440 litres. 40% of the water is used. How many litres are left?
  26. 26.A price goes up by 5% and then goes up by 40% more. By what percent has it gone up in all? =
  27. 27.The price of a school bag changes from ₹4880 to ₹5124. By what percent did it go up?
  28. 28.A water tank holds 1620 litres. 15% of the water is used. How many litres are left?
  29. 29.A water tank holds 2580 litres. 50% of the water is used. How many litres are left?
  30. 30.The price of a bicycle is ₹300. It goes up by 40%. What is the new price (in ₹)?
  31. 31.A water tank holds 4160 litres. 10% of the water is used. How many litres are left?
  32. 32.A town has 3380 people. Its population grows by 40%. How many people live there now?
  33. 33.The price of a school bag changes from ₹720 to ₹936. By what percent did it go up?
  34. 34.A price goes up by 50% and then comes down by 20%. By what percent has it gone up in all? =
  35. 35.A shop sells 1980 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  36. 36.A price goes up by 25% and then goes up by 20% more. By what percent has it gone up in all? =
  37. 37.The price of a school bag changes from ₹3460 to ₹1730. By what percent did it come down?
  38. 38.A shop sells 1800 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  39. 39.A shop sells 3980 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  40. 40.The price of a school bag changes from ₹900 to ₹810. By what percent did it come down?

Answer key

  1. 5
  2. 2226
  3. 40
  4. 2520
  5. 1105
  6. 5740
  7. 37
  8. 285
  9. 40
  10. 110
  11. 10
  12. 15
  13. 84
  14. 5456
  15. 198
  16. 20
  17. 100
  18. 23.5
  19. 4300
  20. 1586
  21. 1512
  22. 65
  23. 2640
  24. 1870
  25. 264
  26. 47
  27. 5
  28. 1377
  29. 1290
  30. 420
  31. 3744
  32. 4732
  33. 30
  34. 20
  35. 2970
  36. 50
  37. 50
  38. 1980
  39. 4378
  40. 10

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