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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 105 · 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 ₹60 to ₹78. By what percent did it go up?
  2. 2.A shop sells 1340 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  3. 3.The price of a school bag changes from ₹100 to ₹115. By what percent did it go up?
  4. 4.A price goes up by 25% and then comes down by 10%. By what percent has it gone up in all? =
  5. 5.The price of a school bag changes from ₹380 to ₹494. By what percent did it go up?
  6. 6.A shop sells 840 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  7. 7.A town has 4900 people. Its population grows by 30%. How many people live there now?
  8. 8.A price comes down by 40% and then comes down by 15% more. By what percent has it come down in all? =
  9. 9.A water tank holds 3100 litres. 40% of the water is used. How many litres are left?
  10. 10.A town has 2520 people. Its population grows by 30%. How many people live there now?
  11. 11.The price of a school bag changes from ₹380 to ₹456. By what percent did it go up?
  12. 12.The price of a school bag changes from ₹2980 to ₹2235. By what percent did it come down?
  13. 13.The price of a school bag changes from ₹2480 to ₹3224. By what percent did it go up?
  14. 14.The price of a school bag changes from ₹4020 to ₹2814. By what percent did it come down?
  15. 15.The price of a school bag changes from ₹4860 to ₹6804. By what percent did it go up?
  16. 16.A price comes down by 5% and then comes down by 20% more. By what percent has it come down in all? =
  17. 17.A price goes up by 50% and then goes up by 50% more. By what percent has it gone up in all? =
  18. 18.The price of a bicycle is ₹2880. It goes up by 25%. What is the new price (in ₹)?
  19. 19.A price goes up by 50% and then goes up by 25% more. By what percent has it gone up in all? =
  20. 20.The price of a school bag changes from ₹1020 to ₹1173. By what percent did it go up?
  21. 21.A shop sells 3200 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  22. 22.The price of a school bag changes from ₹3160 to ₹3792. By what percent did it go up?
  23. 23.A water tank holds 2720 litres. 15% of the water is used. How many litres are left?
  24. 24.The price of a bicycle is ₹4620. It goes up by 20%. What is the new price (in ₹)?
  25. 25.The price of a bicycle is ₹3580. It goes up by 20%. What is the new price (in ₹)?
  26. 26.A price goes up by 40% and then goes up by 25% more. By what percent has it gone up in all? =
  27. 27.A water tank holds 3140 litres. 30% of the water is used. How many litres are left?
  28. 28.A water tank holds 460 litres. 40% of the water is used. How many litres are left?
  29. 29.A price comes down by 15% and then comes down by 50% more. By what percent has it come down in all? =
  30. 30.A water tank holds 2020 litres. 40% of the water is used. How many litres are left?
  31. 31.The price of a bicycle is ₹600. It goes up by 20%. What is the new price (in ₹)?
  32. 32.A water tank holds 4620 litres. 5% of the water is used. How many litres are left?
  33. 33.A price goes up by 40% and then goes up by 30% more. By what percent has it gone up in all? =
  34. 34.A water tank holds 620 litres. 25% of the water is used. How many litres are left?
  35. 35.A shop sells 3380 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  36. 36.The price of a school bag changes from ₹4720 to ₹5664. By what percent did it go up?
  37. 37.The price of a school bag changes from ₹1220 to ₹1708. By what percent did it go up?
  38. 38.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
  39. 39.The price of a school bag changes from ₹460 to ₹414. By what percent did it come down?
  40. 40.A water tank holds 2420 litres. 50% of the water is used. How many litres are left?

Answer key

  1. 30
  2. 1608
  3. 15
  4. 12.5
  5. 30
  6. 1050
  7. 6370
  8. 49
  9. 1860
  10. 3276
  11. 20
  12. 25
  13. 30
  14. 30
  15. 40
  16. 24
  17. 125
  18. 3600
  19. 87.5
  20. 15
  21. 4800
  22. 20
  23. 2312
  24. 5544
  25. 4296
  26. 75
  27. 2198
  28. 276
  29. 57.5
  30. 1212
  31. 720
  32. 4389
  33. 82
  34. 465
  35. 3887
  36. 20
  37. 40
  38. 9.75
  39. 10
  40. 1210

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