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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 883 · 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 water tank holds 3600 litres. 20% of the water is used. How many litres are left?
  2. 2.A price comes down by 10% and then comes down by 10% more. By what percent has it come down in all? =
  3. 3.A town has 1620 people. Its population grows by 30%. How many people live there now?
  4. 4.A water tank holds 1900 litres. 15% of the water is used. How many litres are left?
  5. 5.The price of a school bag changes from ₹4280 to ₹2140. By what percent did it come down?
  6. 6.The price of a school bag changes from ₹4420 to ₹4862. By what percent did it go up?
  7. 7.A price goes up by 5% and then goes up by 15% more. By what percent has it gone up in all? =
  8. 8.A shop sells 4420 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  9. 9.The price of a school bag changes from ₹3580 to ₹4654. By what percent did it go up?
  10. 10.The price of a bicycle is ₹1000. It goes up by 20%. What is the new price (in ₹)?
  11. 11.The price of a school bag changes from ₹3180 to ₹2862. By what percent did it come down?
  12. 12.A price goes up by 5% and then goes up by 25% more. By what percent has it gone up in all? =
  13. 13.The price of a school bag changes from ₹620 to ₹682. By what percent did it go up?
  14. 14.The price of a school bag changes from ₹4000 to ₹5200. By what percent did it go up?
  15. 15.A price comes down by 30% and then comes down by 25% more. By what percent has it come down in all? =
  16. 16.A price comes down by 40% and then comes down by 10% more. By what percent has it come down in all? =
  17. 17.A water tank holds 3740 litres. 40% of the water is used. How many litres are left?
  18. 18.A town has 900 people. Its population grows by 15%. How many people live there now?
  19. 19.The price of a school bag changes from ₹2340 to ₹2691. By what percent did it go up?
  20. 20.A water tank holds 2020 litres. 30% of the water is used. How many litres are left?
  21. 21.The price of a school bag changes from ₹4360 to ₹5450. By what percent did it go up?
  22. 22.A water tank holds 2280 litres. 25% of the water is used. How many litres are left?
  23. 23.A shop sells 2240 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  24. 24.The price of a bicycle is ₹540. It goes up by 40%. What is the new price (in ₹)?
  25. 25.The price of a bicycle is ₹2620. It goes up by 30%. What is the new price (in ₹)?
  26. 26.The price of a school bag changes from ₹2540 to ₹2159. By what percent did it come down?
  27. 27.A town has 3140 people. Its population grows by 40%. How many people live there now?
  28. 28.A price comes down by 15% and then comes down by 5% more. By what percent has it come down in all? =
  29. 29.A water tank holds 660 litres. 50% of the water is used. How many litres are left?
  30. 30.A price goes up by 30% and then comes down by 20%. By what percent has it gone up in all? =
  31. 31.A water tank holds 3080 litres. 30% of the water is used. How many litres are left?
  32. 32.The price of a school bag changes from ₹2920 to ₹4088. By what percent did it go up?
  33. 33.A town has 4440 people. Its population grows by 15%. How many people live there now?
  34. 34.A town has 740 people. Its population grows by 10%. How many people live there now?
  35. 35.A shop sells 2800 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  36. 36.A shop sells 3400 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  37. 37.A price comes down by 15% and then comes down by 10% more. By what percent has it come down in all? =
  38. 38.The price of a school bag changes from ₹1500 to ₹1725. By what percent did it go up?
  39. 39.A town has 180 people. Its population grows by 10%. How many people live there now?
  40. 40.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =

Answer key

  1. 2880
  2. 19
  3. 2106
  4. 1615
  5. 50
  6. 10
  7. 20.75
  8. 6188
  9. 30
  10. 1200
  11. 10
  12. 31.25
  13. 10
  14. 30
  15. 47.5
  16. 46
  17. 2244
  18. 1035
  19. 15
  20. 1414
  21. 25
  22. 1710
  23. 2576
  24. 756
  25. 3406
  26. 15
  27. 4396
  28. 19.25
  29. 330
  30. 4
  31. 2156
  32. 40
  33. 5106
  34. 814
  35. 3220
  36. 4080
  37. 23.5
  38. 15
  39. 198
  40. 37.5

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