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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 833 · 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 40% and then goes up by 40% more. By what percent has it gone up in all? =
  2. 2.A town has 1280 people. Its population grows by 10%. How many people live there now?
  3. 3.A price goes up by 15% and then comes down by 5%. By what percent has it gone up in all? =
  4. 4.A town has 3500 people. Its population grows by 5%. How many people live there now?
  5. 5.The price of a school bag changes from ₹2540 to ₹2794. By what percent did it go up?
  6. 6.A water tank holds 1120 litres. 30% of the water is used. How many litres are left?
  7. 7.The price of a school bag changes from ₹3120 to ₹1872. By what percent did it come down?
  8. 8.A water tank holds 4180 litres. 20% of the water is used. How many litres are left?
  9. 9.A price goes up by 50% and then goes up by 50% more. By what percent has it gone up in all? =
  10. 10.A water tank holds 3200 litres. 10% of the water is used. How many litres are left?
  11. 11.A price comes down by 50% and then comes down by 50% more. By what percent has it come down in all? =
  12. 12.A water tank holds 840 litres. 20% of the water is used. How many litres are left?
  13. 13.A water tank holds 1160 litres. 30% of the water is used. How many litres are left?
  14. 14.A water tank holds 3320 litres. 20% of the water is used. How many litres are left?
  15. 15.A price comes down by 20% and then comes down by 5% more. By what percent has it come down in all? =
  16. 16.A water tank holds 160 litres. 50% of the water is used. How many litres are left?
  17. 17.A water tank holds 860 litres. 10% of the water is used. How many litres are left?
  18. 18.A price goes up by 50% and then goes up by 10% more. By what percent has it gone up in all? =
  19. 19.A price goes up by 30% and then comes down by 20%. By what percent has it gone up in all? =
  20. 20.A price goes up by 25% and then goes up by 30% more. By what percent has it gone up in all? =
  21. 21.A shop sells 3980 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  22. 22.The price of a school bag changes from ₹2960 to ₹2516. By what percent did it come down?
  23. 23.The price of a school bag changes from ₹2460 to ₹3198. By what percent did it go up?
  24. 24.A shop sells 3800 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  25. 25.A price goes up by 40% and then goes up by 30% more. By what percent has it gone up in all? =
  26. 26.The price of a school bag changes from ₹2660 to ₹2793. By what percent did it go up?
  27. 27.A shop sells 1100 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  28. 28.A water tank holds 4100 litres. 50% of the water is used. How many litres are left?
  29. 29.A town has 2540 people. Its population grows by 25%. How many people live there now?
  30. 30.A water tank holds 3420 litres. 40% of the water is used. How many litres are left?
  31. 31.A town has 1240 people. Its population grows by 50%. How many people live there now?
  32. 32.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
  33. 33.A water tank holds 740 litres. 20% of the water is used. How many litres are left?
  34. 34.The price of a school bag changes from ₹2300 to ₹1380. By what percent did it come down?
  35. 35.The price of a school bag changes from ₹920 to ₹644. By what percent did it come down?
  36. 36.A price goes up by 30% and then goes up by 25% more. By what percent has it gone up in all? =
  37. 37.The price of a school bag changes from ₹600 to ₹900. By what percent did it go up?
  38. 38.A shop sells 2900 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  39. 39.The price of a bicycle is ₹3000. It goes up by 25%. What is the new price (in ₹)?
  40. 40.A water tank holds 3860 litres. 50% of the water is used. How many litres are left?

Answer key

  1. 96
  2. 1408
  3. 9.25
  4. 3675
  5. 10
  6. 784
  7. 40
  8. 3344
  9. 125
  10. 2880
  11. 75
  12. 672
  13. 812
  14. 2656
  15. 24
  16. 80
  17. 774
  18. 65
  19. 4
  20. 62.5
  21. 4975
  22. 15
  23. 30
  24. 4560
  25. 82
  26. 5
  27. 1375
  28. 2050
  29. 3175
  30. 2052
  31. 1860
  32. 9.75
  33. 592
  34. 40
  35. 30
  36. 62.5
  37. 50
  38. 3190
  39. 3750
  40. 1930

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