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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 578 · 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.The price of a school bag changes from ₹2160 to ₹2376. By what percent did it go up?
  2. 2.A price comes down by 40% and then comes down by 40% more. By what percent has it come down in all? =
  3. 3.A water tank holds 1240 litres. 5% of the water is used. How many litres are left?
  4. 4.The price of a school bag changes from ₹2940 to ₹3234. By what percent did it go up?
  5. 5.The price of a school bag changes from ₹1920 to ₹2880. By what percent did it go up?
  6. 6.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  7. 7.The price of a school bag changes from ₹2260 to ₹2147. By what percent did it come down?
  8. 8.A price goes up by 50% and then comes down by 15%. By what percent has it gone up in all? =
  9. 9.A water tank holds 1620 litres. 25% of the water is used. How many litres are left?
  10. 10.A price comes down by 15% and then comes down by 30% more. By what percent has it come down in all? =
  11. 11.A town has 1600 people. Its population grows by 20%. How many people live there now?
  12. 12.A water tank holds 2620 litres. 5% of the water is used. How many litres are left?
  13. 13.The price of a school bag changes from ₹2380 to ₹1666. By what percent did it come down?
  14. 14.The price of a school bag changes from ₹1300 to ₹1430. By what percent did it go up?
  15. 15.A water tank holds 1220 litres. 5% of the water is used. How many litres are left?
  16. 16.The price of a school bag changes from ₹3840 to ₹4032. By what percent did it go up?
  17. 17.The price of a school bag changes from ₹780 to ₹741. By what percent did it come down?
  18. 18.A price comes down by 20% and then comes down by 40% more. By what percent has it come down in all? =
  19. 19.A shop sells 2960 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  20. 20.A water tank holds 3120 litres. 30% of the water is used. How many litres are left?
  21. 21.A town has 3960 people. Its population grows by 30%. How many people live there now?
  22. 22.A water tank holds 2800 litres. 30% of the water is used. How many litres are left?
  23. 23.A water tank holds 4700 litres. 5% of the water is used. How many litres are left?
  24. 24.A water tank holds 700 litres. 50% of the water is used. How many litres are left?
  25. 25.A price goes up by 15% and then goes up by 15% more. By what percent has it gone up in all? =
  26. 26.The price of a school bag changes from ₹3900 to ₹5460. By what percent did it go up?
  27. 27.The price of a school bag changes from ₹4000 to ₹2400. By what percent did it come down?
  28. 28.The price of a school bag changes from ₹3700 to ₹3885. By what percent did it go up?
  29. 29.The price of a bicycle is ₹2880. It goes up by 30%. What is the new price (in ₹)?
  30. 30.A water tank holds 4240 litres. 25% of the water is used. How many litres are left?
  31. 31.The price of a bicycle is ₹700. It goes up by 5%. What is the new price (in ₹)?
  32. 32.The price of a bicycle is ₹520. It goes up by 30%. What is the new price (in ₹)?
  33. 33.A shop sells 440 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  34. 34.A water tank holds 1720 litres. 40% of the water is used. How many litres are left?
  35. 35.A price goes up by 40% and then comes down by 10%. By what percent has it gone up in all? =
  36. 36.A water tank holds 920 litres. 15% of the water is used. How many litres are left?
  37. 37.A water tank holds 220 litres. 20% of the water is used. How many litres are left?
  38. 38.The price of a bicycle is ₹1880. It goes up by 15%. What is the new price (in ₹)?
  39. 39.A price goes up by 20% and then goes up by 25% more. By what percent has it gone up in all? =
  40. 40.A price comes down by 25% and then comes down by 25% more. By what percent has it come down in all? =

Answer key

  1. 10
  2. 64
  3. 1178
  4. 10
  5. 50
  6. 21
  7. 5
  8. 27.5
  9. 1215
  10. 40.5
  11. 1920
  12. 2489
  13. 30
  14. 10
  15. 1159
  16. 5
  17. 5
  18. 52
  19. 3256
  20. 2184
  21. 5148
  22. 1960
  23. 4465
  24. 350
  25. 32.25
  26. 40
  27. 40
  28. 5
  29. 3744
  30. 3180
  31. 735
  32. 676
  33. 550
  34. 1032
  35. 26
  36. 782
  37. 176
  38. 2162
  39. 50
  40. 43.75

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