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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 498 · 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 660 people. Its population grows by 40%. How many people live there now?
  2. 2.A price goes up by 50% and then comes down by 15%. By what percent has it gone up in all? =
  3. 3.The price of a bicycle is ₹140. It goes up by 20%. What is the new price (in ₹)?
  4. 4.A price goes up by 5% and then goes up by 25% more. By what percent has it gone up in all? =
  5. 5.The price of a school bag changes from ₹1800 to ₹2070. By what percent did it go up?
  6. 6.The price of a school bag changes from ₹4200 to ₹5880. By what percent did it go up?
  7. 7.A water tank holds 1120 litres. 5% of the water is used. How many litres are left?
  8. 8.The price of a school bag changes from ₹1640 to ₹1394. By what percent did it come down?
  9. 9.A water tank holds 1040 litres. 5% of the water is used. How many litres are left?
  10. 10.A water tank holds 2300 litres. 5% of the water is used. How many litres are left?
  11. 11.A water tank holds 3660 litres. 40% of the water is used. How many litres are left?
  12. 12.A price comes down by 50% and then comes down by 40% more. By what percent has it come down in all? =
  13. 13.A shop sells 1320 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  14. 14.A shop sells 4920 cups of tea a month. Next month it sells 50% more. How many cups does it sell next month?
  15. 15.A water tank holds 1600 litres. 30% of the water is used. How many litres are left?
  16. 16.A water tank holds 3600 litres. 40% of the water is used. How many litres are left?
  17. 17.The price of a school bag changes from ₹540 to ₹567. By what percent did it go up?
  18. 18.A water tank holds 480 litres. 40% of the water is used. How many litres are left?
  19. 19.A price goes up by 25% and then goes up by 30% more. By what percent has it gone up in all? =
  20. 20.The price of a school bag changes from ₹300 to ₹450. By what percent did it go up?
  21. 21.The price of a school bag changes from ₹3940 to ₹4925. By what percent did it go up?
  22. 22.A price goes up by 30% and then goes up by 5% more. By what percent has it gone up in all? =
  23. 23.A water tank holds 4900 litres. 40% of the water is used. How many litres are left?
  24. 24.The price of a bicycle is ₹2660. It goes up by 50%. What is the new price (in ₹)?
  25. 25.The price of a school bag changes from ₹2380 to ₹3094. By what percent did it go up?
  26. 26.A price goes up by 15% and then comes down by 10%. By what percent has it gone up in all? =
  27. 27.The price of a bicycle is ₹3880. It goes up by 25%. What is the new price (in ₹)?
  28. 28.A town has 1580 people. Its population grows by 10%. How many people live there now?
  29. 29.A price goes up by 20% and then goes up by 10% more. By what percent has it gone up in all? =
  30. 30.The price of a school bag changes from ₹3000 to ₹1500. By what percent did it come down?
  31. 31.The price of a bicycle is ₹720. It goes up by 30%. What is the new price (in ₹)?
  32. 32.A town has 520 people. Its population grows by 10%. How many people live there now?
  33. 33.The price of a school bag changes from ₹60 to ₹63. By what percent did it go up?
  34. 34.The price of a school bag changes from ₹2040 to ₹1530. By what percent did it come down?
  35. 35.The price of a school bag changes from ₹3040 to ₹3192. By what percent did it go up?
  36. 36.A water tank holds 1000 litres. 30% of the water is used. How many litres are left?
  37. 37.A water tank holds 4280 litres. 25% of the water is used. How many litres are left?
  38. 38.A water tank holds 1260 litres. 30% of the water is used. How many litres are left?
  39. 39.The price of a bicycle is ₹680. It goes up by 20%. What is the new price (in ₹)?
  40. 40.A water tank holds 3440 litres. 5% of the water is used. How many litres are left?

Answer key

  1. 924
  2. 27.5
  3. 168
  4. 31.25
  5. 15
  6. 40
  7. 1064
  8. 15
  9. 988
  10. 2185
  11. 2196
  12. 70
  13. 1584
  14. 7380
  15. 1120
  16. 2160
  17. 5
  18. 288
  19. 62.5
  20. 50
  21. 25
  22. 36.5
  23. 2940
  24. 3990
  25. 30
  26. 3.5
  27. 4850
  28. 1738
  29. 32
  30. 50
  31. 936
  32. 572
  33. 5
  34. 25
  35. 5
  36. 700
  37. 3210
  38. 882
  39. 816
  40. 3268

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