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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 10 · 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 town has 4400 people. Its population grows by 10%. How many people live there now?
  2. 2.The price of a school bag changes from ₹240 to ₹144. By what percent did it come down?
  3. 3.A water tank holds 4960 litres. 50% of the water is used. How many litres are left?
  4. 4.The price of a school bag changes from ₹2900 to ₹2610. By what percent did it come down?
  5. 5.A water tank holds 4280 litres. 40% of the water is used. How many litres are left?
  6. 6.A shop sells 1640 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  7. 7.A price goes up by 15% and then goes up by 15% more. By what percent has it gone up in all? =
  8. 8.A water tank holds 880 litres. 50% of the water is used. How many litres are left?
  9. 9.A price comes down by 15% and then comes down by 20% more. By what percent has it come down in all? =
  10. 10.A town has 3420 people. Its population grows by 30%. How many people live there now?
  11. 11.A water tank holds 200 litres. 40% of the water is used. How many litres are left?
  12. 12.The price of a school bag changes from ₹640 to ₹384. By what percent did it come down?
  13. 13.A water tank holds 4420 litres. 30% of the water is used. How many litres are left?
  14. 14.A water tank holds 1720 litres. 20% of the water is used. How many litres are left?
  15. 15.A water tank holds 2360 litres. 20% of the water is used. How many litres are left?
  16. 16.A shop sells 1460 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  17. 17.The price of a bicycle is ₹1480. It goes up by 20%. What is the new price (in ₹)?
  18. 18.The price of a school bag changes from ₹2000 to ₹2600. By what percent did it go up?
  19. 19.A shop sells 880 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  20. 20.A price goes up by 25% and then comes down by 15%. By what percent has it gone up in all? =
  21. 21.A price comes down by 20% and then comes down by 50% more. By what percent has it come down in all? =
  22. 22.The price of a school bag changes from ₹1340 to ₹1608. By what percent did it go up?
  23. 23.A water tank holds 1180 litres. 5% of the water is used. How many litres are left?
  24. 24.A price goes up by 25% and then goes up by 15% more. By what percent has it gone up in all? =
  25. 25.The price of a school bag changes from ₹1940 to ₹1552. By what percent did it come down?
  26. 26.A price goes up by 10% and then comes down by 5%. By what percent has it gone up in all? =
  27. 27.A price comes down by 10% and then comes down by 30% more. By what percent has it come down in all? =
  28. 28.A water tank holds 4920 litres. 5% of the water is used. How many litres are left?
  29. 29.The price of a school bag changes from ₹2300 to ₹1380. By what percent did it come down?
  30. 30.A price goes up by 10% and then goes up by 40% more. By what percent has it gone up in all? =
  31. 31.A town has 4480 people. Its population grows by 40%. How many people live there now?
  32. 32.A price goes up by 25% and then comes down by 5%. By what percent has it gone up in all? =
  33. 33.A price goes up by 30% and then goes up by 15% more. By what percent has it gone up in all? =
  34. 34.A price goes up by 20% and then goes up by 30% more. By what percent has it gone up in all? =
  35. 35.A town has 4080 people. Its population grows by 40%. How many people live there now?
  36. 36.A shop sells 320 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  37. 37.A price comes down by 15% and then comes down by 25% more. By what percent has it come down in all? =
  38. 38.A water tank holds 1920 litres. 10% of the water is used. How many litres are left?
  39. 39.A water tank holds 3120 litres. 5% of the water is used. How many litres are left?
  40. 40.A water tank holds 4300 litres. 15% of the water is used. How many litres are left?

Answer key

  1. 4840
  2. 40
  3. 2480
  4. 10
  5. 2568
  6. 1804
  7. 32.25
  8. 440
  9. 32
  10. 4446
  11. 120
  12. 40
  13. 3094
  14. 1376
  15. 1888
  16. 2044
  17. 1776
  18. 30
  19. 1320
  20. 6.25
  21. 60
  22. 20
  23. 1121
  24. 43.75
  25. 20
  26. 4.5
  27. 37
  28. 4674
  29. 40
  30. 54
  31. 6272
  32. 18.75
  33. 49.5
  34. 56
  35. 5712
  36. 400
  37. 36.25
  38. 1728
  39. 2964
  40. 3655

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