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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 211 · 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 20% and then goes up by 10% more. By what percent has it gone up in all? =
  2. 2.The price of a school bag changes from ₹1640 to ₹2050. By what percent did it go up?
  3. 3.The price of a school bag changes from ₹440 to ₹484. By what percent did it go up?
  4. 4.A price goes up by 30% and then comes down by 10%. By what percent has it gone up in all? =
  5. 5.The price of a bicycle is ₹1460. It goes up by 30%. What is the new price (in ₹)?
  6. 6.A price goes up by 30% and then comes down by 15%. By what percent has it gone up in all? =
  7. 7.The price of a school bag changes from ₹880 to ₹1056. By what percent did it go up?
  8. 8.A town has 2260 people. Its population grows by 30%. How many people live there now?
  9. 9.The price of a school bag changes from ₹2780 to ₹3614. By what percent did it go up?
  10. 10.A price goes up by 5% and then goes up by 50% more. By what percent has it gone up in all? =
  11. 11.A shop sells 2220 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  12. 12.A water tank holds 4460 litres. 40% of the water is used. How many litres are left?
  13. 13.A price goes up by 10% and then comes down by 5%. By what percent has it gone up in all? =
  14. 14.The price of a school bag changes from ₹4620 to ₹3465. By what percent did it come down?
  15. 15.A water tank holds 1620 litres. 50% of the water is used. How many litres are left?
  16. 16.A shop sells 4140 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  17. 17.A price comes down by 10% and then comes down by 10% more. By what percent has it come down in all? =
  18. 18.A water tank holds 3880 litres. 15% of the water is used. How many litres are left?
  19. 19.The price of a bicycle is ₹60. It goes up by 40%. What is the new price (in ₹)?
  20. 20.A price comes down by 10% and then comes down by 50% more. By what percent has it come down in all? =
  21. 21.A price comes down by 30% and then comes down by 15% more. By what percent has it come down in all? =
  22. 22.A water tank holds 4700 litres. 40% of the water is used. How many litres are left?
  23. 23.A price goes up by 30% and then goes up by 10% more. By what percent has it gone up in all? =
  24. 24.A water tank holds 160 litres. 40% of the water is used. How many litres are left?
  25. 25.The price of a school bag changes from ₹4380 to ₹5475. By what percent did it go up?
  26. 26.A town has 500 people. Its population grows by 20%. How many people live there now?
  27. 27.A price goes up by 30% and then goes up by 5% more. By what percent has it gone up in all? =
  28. 28.A price goes up by 50% and then comes down by 10%. By what percent has it gone up in all? =
  29. 29.A price goes up by 5% and then goes up by 5% more. By what percent has it gone up in all? =
  30. 30.A shop sells 3820 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  31. 31.The price of a school bag changes from ₹2140 to ₹2354. By what percent did it go up?
  32. 32.A price comes down by 25% and then comes down by 5% more. By what percent has it come down in all? =
  33. 33.A price comes down by 50% and then comes down by 20% more. By what percent has it come down in all? =
  34. 34.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  35. 35.A water tank holds 3900 litres. 5% of the water is used. How many litres are left?
  36. 36.A price comes down by 40% and then comes down by 40% more. By what percent has it come down in all? =
  37. 37.The price of a school bag changes from ₹520 to ₹416. By what percent did it come down?
  38. 38.A price goes up by 10% and then goes up by 15% more. By what percent has it gone up in all? =
  39. 39.The price of a school bag changes from ₹800 to ₹1120. By what percent did it go up?
  40. 40.A price goes up by 25% and then goes up by 50% more. By what percent has it gone up in all? =

Answer key

  1. 32
  2. 25
  3. 10
  4. 17
  5. 1898
  6. 10.5
  7. 20
  8. 2938
  9. 30
  10. 57.5
  11. 3330
  12. 2676
  13. 4.5
  14. 25
  15. 810
  16. 4968
  17. 19
  18. 3298
  19. 84
  20. 55
  21. 40.5
  22. 2820
  23. 43
  24. 96
  25. 25
  26. 600
  27. 36.5
  28. 35
  29. 10.25
  30. 4584
  31. 10
  32. 28.75
  33. 60
  34. 21
  35. 3705
  36. 64
  37. 20
  38. 26.5
  39. 40
  40. 87.5

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