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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 178 · 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 town has 2800 people. Its population grows by 50%. How many people live there now?
  2. 2.A water tank holds 2400 litres. 50% of the water is used. How many litres are left?
  3. 3.A town has 2920 people. Its population grows by 15%. How many people live there now?
  4. 4.A price goes up by 10% and then comes down by 5%. By what percent has it gone up in all? =
  5. 5.The price of a school bag changes from ₹2560 to ₹2688. By what percent did it go up?
  6. 6.A town has 2800 people. Its population grows by 15%. How many people live there now?
  7. 7.The price of a school bag changes from ₹4920 to ₹2952. By what percent did it come down?
  8. 8.A price goes up by 25% and then goes up by 40% more. By what percent has it gone up in all? =
  9. 9.A price comes down by 20% and then comes down by 5% more. By what percent has it come down in all? =
  10. 10.A water tank holds 260 litres. 10% of the water is used. How many litres are left?
  11. 11.The price of a school bag changes from ₹3480 to ₹2610. By what percent did it come down?
  12. 12.A shop sells 4940 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  13. 13.The price of a school bag changes from ₹720 to ₹900. By what percent did it go up?
  14. 14.The price of a school bag changes from ₹1160 to ₹986. By what percent did it come down?
  15. 15.A price goes up by 30% and then goes up by 20% more. By what percent has it gone up in all? =
  16. 16.The price of a school bag changes from ₹4720 to ₹5192. By what percent did it go up?
  17. 17.A town has 4740 people. Its population grows by 10%. How many people live there now?
  18. 18.A water tank holds 1860 litres. 25% of the water is used. How many litres are left?
  19. 19.A price comes down by 50% and then comes down by 10% more. By what percent has it come down in all? =
  20. 20.A shop sells 1060 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  21. 21.A water tank holds 4260 litres. 50% of the water is used. How many litres are left?
  22. 22.A water tank holds 3320 litres. 10% of the water is used. How many litres are left?
  23. 23.A shop sells 3080 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  24. 24.The price of a school bag changes from ₹1020 to ₹1428. By what percent did it go up?
  25. 25.A water tank holds 3640 litres. 15% of the water is used. How many litres are left?
  26. 26.A water tank holds 880 litres. 5% of the water is used. How many litres are left?
  27. 27.A price comes down by 40% and then comes down by 25% more. By what percent has it come down in all? =
  28. 28.A price goes up by 5% and then goes up by 40% more. By what percent has it gone up in all? =
  29. 29.The price of a school bag changes from ₹2940 to ₹3087. By what percent did it go up?
  30. 30.A price goes up by 50% and then goes up by 25% more. By what percent has it gone up in all? =
  31. 31.A water tank holds 640 litres. 5% of the water is used. How many litres are left?
  32. 32.A town has 2280 people. Its population grows by 40%. How many people live there now?
  33. 33.The price of a school bag changes from ₹1780 to ₹2314. By what percent did it go up?
  34. 34.A price comes down by 50% and then comes down by 15% more. By what percent has it come down in all? =
  35. 35.A town has 4780 people. Its population grows by 25%. How many people live there now?
  36. 36.A price comes down by 40% and then comes down by 10% more. By what percent has it come down in all? =
  37. 37.A price comes down by 50% and then comes down by 5% more. By what percent has it come down in all? =
  38. 38.The price of a school bag changes from ₹1060 to ₹636. By what percent did it come down?
  39. 39.A price comes down by 5% and then comes down by 30% more. By what percent has it come down in all? =
  40. 40.The price of a school bag changes from ₹2900 to ₹2465. By what percent did it come down?

Answer key

  1. 4200
  2. 1200
  3. 3358
  4. 4.5
  5. 5
  6. 3220
  7. 40
  8. 75
  9. 24
  10. 234
  11. 25
  12. 5928
  13. 25
  14. 15
  15. 56
  16. 10
  17. 5214
  18. 1395
  19. 55
  20. 1166
  21. 2130
  22. 2988
  23. 4620
  24. 40
  25. 3094
  26. 836
  27. 55
  28. 47
  29. 5
  30. 87.5
  31. 608
  32. 3192
  33. 30
  34. 57.5
  35. 5975
  36. 46
  37. 52.5
  38. 40
  39. 33.5
  40. 15

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