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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 287 · 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 1820 people. Its population grows by 40%. How many people live there now?
  2. 2.A price comes down by 5% and then comes down by 25% more. By what percent has it come down in all? =
  3. 3.A water tank holds 1980 litres. 15% of the water is used. How many litres are left?
  4. 4.A water tank holds 1540 litres. 20% of the water is used. How many litres are left?
  5. 5.The price of a school bag changes from ₹720 to ₹1080. By what percent did it go up?
  6. 6.The price of a bicycle is ₹2920. It goes up by 25%. What is the new price (in ₹)?
  7. 7.The price of a school bag changes from ₹1140 to ₹1710. By what percent did it go up?
  8. 8.A shop sells 3580 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  9. 9.A water tank holds 1200 litres. 25% of the water is used. How many litres are left?
  10. 10.A shop sells 3140 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  11. 11.A price comes down by 30% and then comes down by 25% more. By what percent has it come down in all? =
  12. 12.A shop sells 3460 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  13. 13.A price goes up by 20% and then goes up by 25% more. By what percent has it gone up in all? =
  14. 14.The price of a school bag changes from ₹4280 to ₹3852. By what percent did it come down?
  15. 15.The price of a school bag changes from ₹3940 to ₹2955. By what percent did it come down?
  16. 16.The price of a school bag changes from ₹80 to ₹96. By what percent did it go up?
  17. 17.A price comes down by 50% and then comes down by 40% more. By what percent has it come down in all? =
  18. 18.A price goes up by 30% and then goes up by 15% more. By what percent has it gone up in all? =
  19. 19.The price of a bicycle is ₹3500. It goes up by 5%. What is the new price (in ₹)?
  20. 20.The price of a school bag changes from ₹4400 to ₹6600. By what percent did it go up?
  21. 21.A water tank holds 4160 litres. 25% of the water is used. How many litres are left?
  22. 22.A price goes up by 40% and then goes up by 30% more. By what percent has it gone up in all? =
  23. 23.The price of a school bag changes from ₹640 to ₹448. By what percent did it come down?
  24. 24.The price of a school bag changes from ₹4460 to ₹5129. By what percent did it go up?
  25. 25.A price comes down by 30% and then comes down by 40% more. By what percent has it come down in all? =
  26. 26.A town has 2200 people. Its population grows by 25%. How many people live there now?
  27. 27.The price of a bicycle is ₹1740. It goes up by 10%. What is the new price (in ₹)?
  28. 28.The price of a bicycle is ₹860. It goes up by 40%. What is the new price (in ₹)?
  29. 29.The price of a school bag changes from ₹800 to ₹1040. By what percent did it go up?
  30. 30.The price of a school bag changes from ₹260 to ₹390. By what percent did it go up?
  31. 31.A town has 3240 people. Its population grows by 10%. How many people live there now?
  32. 32.The price of a school bag changes from ₹1340 to ₹670. By what percent did it come down?
  33. 33.The price of a bicycle is ₹140. It goes up by 30%. What is the new price (in ₹)?
  34. 34.The price of a bicycle is ₹3360. It goes up by 25%. What is the new price (in ₹)?
  35. 35.A price comes down by 5% and then comes down by 15% more. By what percent has it come down in all? =
  36. 36.A price goes up by 5% and then goes up by 30% more. By what percent has it gone up in all? =
  37. 37.A town has 860 people. Its population grows by 40%. How many people live there now?
  38. 38.A shop sells 4920 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  39. 39.A water tank holds 3900 litres. 50% of the water is used. How many litres are left?
  40. 40.A water tank holds 3020 litres. 20% of the water is used. How many litres are left?

Answer key

  1. 2548
  2. 28.75
  3. 1683
  4. 1232
  5. 50
  6. 3650
  7. 50
  8. 3759
  9. 900
  10. 3297
  11. 47.5
  12. 4152
  13. 50
  14. 10
  15. 25
  16. 20
  17. 70
  18. 49.5
  19. 3675
  20. 50
  21. 3120
  22. 82
  23. 30
  24. 15
  25. 58
  26. 2750
  27. 1914
  28. 1204
  29. 30
  30. 50
  31. 3564
  32. 50
  33. 182
  34. 4200
  35. 19.25
  36. 36.5
  37. 1204
  38. 5166
  39. 1950
  40. 2416

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