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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 7 · 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 ₹1800 to ₹2520. By what percent did it go up?
  2. 2.A price goes up by 5% and then goes up by 25% more. By what percent has it gone up in all? =
  3. 3.The price of a school bag changes from ₹2240 to ₹2912. By what percent did it go up?
  4. 4.The price of a school bag changes from ₹3300 to ₹4125. By what percent did it go up?
  5. 5.A town has 4880 people. Its population grows by 25%. How many people live there now?
  6. 6.The price of a school bag changes from ₹360 to ₹378. By what percent did it go up?
  7. 7.A water tank holds 1840 litres. 10% of the water is used. How many litres are left?
  8. 8.A water tank holds 1680 litres. 10% of the water is used. How many litres are left?
  9. 9.The price of a bicycle is ₹3560. It goes up by 15%. What is the new price (in ₹)?
  10. 10.A shop sells 3340 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  11. 11.The price of a school bag changes from ₹1340 to ₹1407. By what percent did it go up?
  12. 12.The price of a bicycle is ₹4780. It goes up by 30%. What is the new price (in ₹)?
  13. 13.A town has 580 people. Its population grows by 50%. How many people live there now?
  14. 14.A price goes up by 50% and then goes up by 25% more. By what percent has it gone up in all? =
  15. 15.The price of a school bag changes from ₹800 to ₹1040. By what percent did it go up?
  16. 16.A price goes up by 25% and then goes up by 30% more. By what percent has it gone up in all? =
  17. 17.A price goes up by 15% and then goes up by 5% more. By what percent has it gone up in all? =
  18. 18.A shop sells 2860 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  19. 19.The price of a school bag changes from ₹1480 to ₹1036. By what percent did it come down?
  20. 20.A water tank holds 4000 litres. 15% of the water is used. How many litres are left?
  21. 21.A water tank holds 3940 litres. 5% of the water is used. How many litres are left?
  22. 22.A price goes up by 40% and then comes down by 25%. By what percent has it gone up in all? =
  23. 23.A price comes down by 25% and then comes down by 30% more. By what percent has it come down in all? =
  24. 24.A price goes up by 5% and then goes up by 20% more. By what percent has it gone up in all? =
  25. 25.A water tank holds 1400 litres. 15% of the water is used. How many litres are left?
  26. 26.A water tank holds 480 litres. 30% of the water is used. How many litres are left?
  27. 27.A price comes down by 20% and then comes down by 15% more. By what percent has it come down in all? =
  28. 28.The price of a bicycle is ₹4700. It goes up by 25%. What is the new price (in ₹)?
  29. 29.A water tank holds 4520 litres. 10% of the water is used. How many litres are left?
  30. 30.The price of a school bag changes from ₹3280 to ₹3608. By what percent did it go up?
  31. 31.A water tank holds 3040 litres. 40% of the water is used. How many litres are left?
  32. 32.The price of a bicycle is ₹2260. It goes up by 40%. What is the new price (in ₹)?
  33. 33.A water tank holds 1520 litres. 5% of the water is used. How many litres are left?
  34. 34.A town has 220 people. Its population grows by 25%. How many people live there now?
  35. 35.A town has 1020 people. Its population grows by 10%. How many people live there now?
  36. 36.A price goes up by 25% and then goes up by 40% more. By what percent has it gone up in all? =
  37. 37.The price of a school bag changes from ₹2140 to ₹2354. By what percent did it go up?
  38. 38.The price of a bicycle is ₹560. It goes up by 50%. What is the new price (in ₹)?
  39. 39.A price comes down by 15% and then comes down by 50% more. By what percent has it come down in all? =
  40. 40.A shop sells 740 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?

Answer key

  1. 40
  2. 31.25
  3. 30
  4. 25
  5. 6100
  6. 5
  7. 1656
  8. 1512
  9. 4094
  10. 5010
  11. 5
  12. 6214
  13. 870
  14. 87.5
  15. 30
  16. 62.5
  17. 20.75
  18. 3432
  19. 30
  20. 3400
  21. 3743
  22. 5
  23. 47.5
  24. 26
  25. 1190
  26. 336
  27. 32
  28. 5875
  29. 4068
  30. 10
  31. 1824
  32. 3164
  33. 1444
  34. 275
  35. 1122
  36. 75
  37. 10
  38. 840
  39. 57.5
  40. 1036

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