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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 918 · 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 ₹2100 to ₹1260. By what percent did it come down?
  2. 2.The price of a school bag changes from ₹2300 to ₹2645. By what percent did it go up?
  3. 3.A price goes up by 5% and then goes up by 5% more. By what percent has it gone up in all? =
  4. 4.The price of a bicycle is ₹3300. It goes up by 5%. What is the new price (in ₹)?
  5. 5.The price of a school bag changes from ₹1820 to ₹1547. By what percent did it come down?
  6. 6.The price of a school bag changes from ₹4640 to ₹4408. By what percent did it come down?
  7. 7.A town has 4200 people. Its population grows by 25%. How many people live there now?
  8. 8.The price of a school bag changes from ₹2720 to ₹2040. By what percent did it come down?
  9. 9.A water tank holds 4780 litres. 20% of the water is used. How many litres are left?
  10. 10.A water tank holds 80 litres. 40% of the water is used. How many litres are left?
  11. 11.A town has 3000 people. Its population grows by 50%. How many people live there now?
  12. 12.A shop sells 500 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  13. 13.The price of a bicycle is ₹340. It goes up by 10%. What is the new price (in ₹)?
  14. 14.A water tank holds 3080 litres. 5% of the water is used. How many litres are left?
  15. 15.The price of a school bag changes from ₹840 to ₹882. By what percent did it go up?
  16. 16.The price of a school bag changes from ₹1020 to ₹612. By what percent did it come down?
  17. 17.A price goes up by 30% and then goes up by 25% more. By what percent has it gone up in all? =
  18. 18.A water tank holds 4420 litres. 50% of the water is used. How many litres are left?
  19. 19.A water tank holds 1200 litres. 20% of the water is used. How many litres are left?
  20. 20.The price of a school bag changes from ₹4960 to ₹4464. By what percent did it come down?
  21. 21.A price comes down by 5% and then comes down by 15% more. By what percent has it come down in all? =
  22. 22.The price of a school bag changes from ₹2800 to ₹3220. By what percent did it go up?
  23. 23.A town has 4060 people. Its population grows by 20%. How many people live there now?
  24. 24.A water tank holds 3180 litres. 30% of the water is used. How many litres are left?
  25. 25.A price comes down by 5% and then comes down by 30% more. By what percent has it come down in all? =
  26. 26.A town has 120 people. Its population grows by 20%. How many people live there now?
  27. 27.The price of a school bag changes from ₹5000 to ₹5500. By what percent did it go up?
  28. 28.The price of a bicycle is ₹1420. It goes up by 5%. What is the new price (in ₹)?
  29. 29.The price of a school bag changes from ₹740 to ₹444. By what percent did it come down?
  30. 30.A water tank holds 2040 litres. 40% of the water is used. How many litres are left?
  31. 31.A water tank holds 4000 litres. 40% of the water is used. How many litres are left?
  32. 32.A town has 3720 people. Its population grows by 25%. How many people live there now?
  33. 33.A water tank holds 4160 litres. 50% of the water is used. How many litres are left?
  34. 34.A price comes down by 25% and then comes down by 15% more. By what percent has it come down in all? =
  35. 35.The price of a school bag changes from ₹1940 to ₹1552. By what percent did it come down?
  36. 36.A town has 540 people. Its population grows by 25%. How many people live there now?
  37. 37.The price of a bicycle is ₹3640. It goes up by 10%. What is the new price (in ₹)?
  38. 38.A water tank holds 3600 litres. 50% of the water is used. How many litres are left?
  39. 39.A shop sells 240 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  40. 40.A price goes up by 20% and then goes up by 10% more. By what percent has it gone up in all? =

Answer key

  1. 40
  2. 15
  3. 10.25
  4. 3465
  5. 15
  6. 5
  7. 5250
  8. 25
  9. 3824
  10. 48
  11. 4500
  12. 600
  13. 374
  14. 2926
  15. 5
  16. 40
  17. 62.5
  18. 2210
  19. 960
  20. 10
  21. 19.25
  22. 15
  23. 4872
  24. 2226
  25. 33.5
  26. 144
  27. 10
  28. 1491
  29. 40
  30. 1224
  31. 2400
  32. 4650
  33. 2080
  34. 36.25
  35. 20
  36. 675
  37. 4004
  38. 1800
  39. 312
  40. 32

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