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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 94 · 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 ₹4420 to ₹5746. By what percent did it go up?
  2. 2.A price goes up by 15% and then goes up by 40% more. By what percent has it gone up in all? =
  3. 3.The price of a school bag changes from ₹1580 to ₹1738. By what percent did it go up?
  4. 4.A water tank holds 2120 litres. 15% of the water is used. How many litres are left?
  5. 5.A water tank holds 1100 litres. 5% of the water is used. How many litres are left?
  6. 6.A water tank holds 3500 litres. 40% of the water is used. How many litres are left?
  7. 7.A water tank holds 3740 litres. 10% of the water is used. How many litres are left?
  8. 8.The price of a school bag changes from ₹3560 to ₹4984. By what percent did it go up?
  9. 9.A shop sells 600 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  10. 10.A water tank holds 2040 litres. 15% of the water is used. How many litres are left?
  11. 11.A town has 4760 people. Its population grows by 30%. How many people live there now?
  12. 12.A water tank holds 4620 litres. 20% of the water is used. How many litres are left?
  13. 13.The price of a school bag changes from ₹4500 to ₹6300. By what percent did it go up?
  14. 14.A water tank holds 1240 litres. 40% of the water is used. How many litres are left?
  15. 15.A town has 4780 people. Its population grows by 50%. How many people live there now?
  16. 16.The price of a bicycle is ₹3340. It goes up by 20%. What is the new price (in ₹)?
  17. 17.The price of a school bag changes from ₹3040 to ₹2432. By what percent did it come down?
  18. 18.A price goes up by 30% and then comes down by 10%. By what percent has it gone up in all? =
  19. 19.The price of a bicycle is ₹4620. It goes up by 25%. What is the new price (in ₹)?
  20. 20.A price goes up by 15% and then goes up by 10% more. By what percent has it gone up in all? =
  21. 21.A price goes up by 50% and then goes up by 15% more. By what percent has it gone up in all? =
  22. 22.A town has 2640 people. Its population grows by 30%. How many people live there now?
  23. 23.The price of a bicycle is ₹3880. It goes up by 15%. What is the new price (in ₹)?
  24. 24.A water tank holds 4360 litres. 10% of the water is used. How many litres are left?
  25. 25.A price comes down by 30% and then comes down by 10% more. By what percent has it come down in all? =
  26. 26.A town has 2620 people. Its population grows by 25%. How many people live there now?
  27. 27.A price goes up by 40% and then comes down by 5%. By what percent has it gone up in all? =
  28. 28.A water tank holds 420 litres. 20% of the water is used. How many litres are left?
  29. 29.The price of a bicycle is ₹500. It goes up by 10%. What is the new price (in ₹)?
  30. 30.The price of a bicycle is ₹1620. It goes up by 20%. What is the new price (in ₹)?
  31. 31.The price of a school bag changes from ₹4020 to ₹4623. By what percent did it go up?
  32. 32.The price of a school bag changes from ₹4640 to ₹2320. By what percent did it come down?
  33. 33.The price of a school bag changes from ₹300 to ₹210. By what percent did it come down?
  34. 34.A town has 3660 people. Its population grows by 50%. How many people live there now?
  35. 35.A town has 1100 people. Its population grows by 50%. How many people live there now?
  36. 36.The price of a bicycle is ₹240. It goes up by 25%. What is the new price (in ₹)?
  37. 37.A town has 2580 people. Its population grows by 10%. How many people live there now?
  38. 38.The price of a bicycle is ₹800. It goes up by 15%. What is the new price (in ₹)?
  39. 39.A water tank holds 3920 litres. 30% of the water is used. How many litres are left?
  40. 40.A water tank holds 2140 litres. 30% of the water is used. How many litres are left?

Answer key

  1. 30
  2. 61
  3. 10
  4. 1802
  5. 1045
  6. 2100
  7. 3366
  8. 40
  9. 660
  10. 1734
  11. 6188
  12. 3696
  13. 40
  14. 744
  15. 7170
  16. 4008
  17. 20
  18. 17
  19. 5775
  20. 26.5
  21. 72.5
  22. 3432
  23. 4462
  24. 3924
  25. 37
  26. 3275
  27. 33
  28. 336
  29. 550
  30. 1944
  31. 15
  32. 50
  33. 30
  34. 5490
  35. 1650
  36. 300
  37. 2838
  38. 920
  39. 2744
  40. 1498

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