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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 986 · 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 200 people. Its population grows by 15%. How many people live there now?
  2. 2.A price goes up by 15% and then goes up by 5% more. By what percent has it gone up in all? =
  3. 3.A price comes down by 50% and then comes down by 20% more. By what percent has it come down in all? =
  4. 4.A water tank holds 4700 litres. 15% of the water is used. How many litres are left?
  5. 5.A water tank holds 2020 litres. 20% of the water is used. How many litres are left?
  6. 6.The price of a school bag changes from ₹3160 to ₹4740. By what percent did it go up?
  7. 7.A water tank holds 4960 litres. 5% of the water is used. How many litres are left?
  8. 8.A water tank holds 4920 litres. 5% of the water is used. How many litres are left?
  9. 9.A water tank holds 3140 litres. 15% of the water is used. How many litres are left?
  10. 10.A town has 740 people. Its population grows by 20%. How many people live there now?
  11. 11.A price comes down by 50% and then comes down by 15% more. By what percent has it come down in all? =
  12. 12.A price goes up by 50% and then goes up by 15% more. By what percent has it gone up in all? =
  13. 13.A price goes up by 10% and then goes up by 50% more. By what percent has it gone up in all? =
  14. 14.A water tank holds 3200 litres. 20% of the water is used. How many litres are left?
  15. 15.A shop sells 2280 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  16. 16.A price goes up by 40% and then comes down by 10%. By what percent has it gone up in all? =
  17. 17.A water tank holds 1140 litres. 15% of the water is used. How many litres are left?
  18. 18.A town has 2720 people. Its population grows by 50%. How many people live there now?
  19. 19.A price comes down by 40% and then comes down by 50% more. By what percent has it come down in all? =
  20. 20.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  21. 21.A price comes down by 50% and then comes down by 50% more. By what percent has it come down in all? =
  22. 22.A water tank holds 1000 litres. 30% of the water is used. How many litres are left?
  23. 23.A water tank holds 60 litres. 30% of the water is used. How many litres are left?
  24. 24.A price comes down by 15% and then comes down by 40% more. By what percent has it come down in all? =
  25. 25.The price of a school bag changes from ₹340 to ₹204. By what percent did it come down?
  26. 26.The price of a school bag changes from ₹3480 to ₹3654. By what percent did it go up?
  27. 27.A water tank holds 1260 litres. 30% of the water is used. How many litres are left?
  28. 28.The price of a bicycle is ₹120. It goes up by 25%. What is the new price (in ₹)?
  29. 29.A town has 2260 people. Its population grows by 15%. How many people live there now?
  30. 30.The price of a bicycle is ₹2660. It goes up by 25%. What is the new price (in ₹)?
  31. 31.The price of a bicycle is ₹4240. It goes up by 15%. What is the new price (in ₹)?
  32. 32.A shop sells 3440 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  33. 33.A town has 660 people. Its population grows by 15%. How many people live there now?
  34. 34.A town has 660 people. Its population grows by 25%. How many people live there now?
  35. 35.A price goes up by 50% and then goes up by 50% more. By what percent has it gone up in all? =
  36. 36.A water tank holds 1520 litres. 30% of the water is used. How many litres are left?
  37. 37.The price of a school bag changes from ₹1360 to ₹1224. By what percent did it come down?
  38. 38.A water tank holds 2960 litres. 5% of the water is used. How many litres are left?
  39. 39.A price goes up by 10% and then goes up by 15% more. By what percent has it gone up in all? =
  40. 40.A town has 760 people. Its population grows by 50%. How many people live there now?

Answer key

  1. 230
  2. 20.75
  3. 60
  4. 3995
  5. 1616
  6. 50
  7. 4712
  8. 4674
  9. 2669
  10. 888
  11. 57.5
  12. 72.5
  13. 65
  14. 2560
  15. 2736
  16. 26
  17. 969
  18. 4080
  19. 70
  20. 21
  21. 75
  22. 700
  23. 42
  24. 49
  25. 40
  26. 5
  27. 882
  28. 150
  29. 2599
  30. 3325
  31. 4876
  32. 4816
  33. 759
  34. 825
  35. 125
  36. 1064
  37. 10
  38. 2812
  39. 26.5
  40. 1140

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