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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 673 · 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 water tank holds 4280 litres. 5% of the water is used. How many litres are left?
  2. 2.The price of a bicycle is ₹3320. It goes up by 5%. What is the new price (in ₹)?
  3. 3.A price comes down by 30% and then comes down by 5% more. By what percent has it come down in all? =
  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.A price goes up by 40% and then comes down by 5%. By what percent has it gone up in all? =
  6. 6.The price of a school bag changes from ₹240 to ₹216. By what percent did it come down?
  7. 7.A water tank holds 1720 litres. 50% of the water is used. How many litres are left?
  8. 8.The price of a school bag changes from ₹560 to ₹588. By what percent did it go up?
  9. 9.The price of a school bag changes from ₹4520 to ₹5650. By what percent did it go up?
  10. 10.A water tank holds 600 litres. 50% of the water is used. How many litres are left?
  11. 11.A shop sells 3280 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  12. 12.A town has 2640 people. Its population grows by 5%. How many people live there now?
  13. 13.The price of a school bag changes from ₹2620 to ₹2489. By what percent did it come down?
  14. 14.A shop sells 680 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  15. 15.The price of a bicycle is ₹4440. It goes up by 10%. What is the new price (in ₹)?
  16. 16.A shop sells 4940 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  17. 17.A town has 1620 people. Its population grows by 25%. How many people live there now?
  18. 18.A price comes down by 30% and then comes down by 15% more. By what percent has it come down in all? =
  19. 19.A water tank holds 4320 litres. 40% of the water is used. How many litres are left?
  20. 20.The price of a school bag changes from ₹3900 to ₹3120. By what percent did it come down?
  21. 21.The price of a school bag changes from ₹520 to ₹494. By what percent did it come down?
  22. 22.The price of a school bag changes from ₹5000 to ₹3750. By what percent did it come down?
  23. 23.A price goes up by 30% and then goes up by 40% more. By what percent has it gone up in all? =
  24. 24.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =
  25. 25.A water tank holds 4740 litres. 15% of the water is used. How many litres are left?
  26. 26.A water tank holds 3740 litres. 25% of the water is used. How many litres are left?
  27. 27.The price of a bicycle is ₹4120. It goes up by 15%. What is the new price (in ₹)?
  28. 28.The price of a bicycle is ₹900. It goes up by 40%. What is the new price (in ₹)?
  29. 29.A water tank holds 2320 litres. 30% of the water is used. How many litres are left?
  30. 30.A price goes up by 40% and then goes up by 5% more. By what percent has it gone up in all? =
  31. 31.The price of a school bag changes from ₹460 to ₹230. By what percent did it come down?
  32. 32.A water tank holds 1180 litres. 50% of the water is used. How many litres are left?
  33. 33.A town has 840 people. Its population grows by 20%. How many people live there now?
  34. 34.A town has 1020 people. Its population grows by 30%. How many people live there now?
  35. 35.A price comes down by 15% and then comes down by 30% more. By what percent has it come down in all? =
  36. 36.The price of a school bag changes from ₹1320 to ₹1980. By what percent did it go up?
  37. 37.A price goes up by 25% and then comes down by 5%. By what percent has it gone up in all? =
  38. 38.The price of a school bag changes from ₹380 to ₹342. By what percent did it come down?
  39. 39.A price comes down by 50% and then comes down by 15% more. By what percent has it come down in all? =
  40. 40.A price goes up by 20% and then comes down by 15%. By what percent has it gone up in all? =

Answer key

  1. 4066
  2. 3486
  3. 33.5
  4. 31.25
  5. 33
  6. 10
  7. 860
  8. 5
  9. 25
  10. 300
  11. 3772
  12. 2772
  13. 5
  14. 714
  15. 4884
  16. 5681
  17. 2025
  18. 40.5
  19. 2592
  20. 20
  21. 5
  22. 25
  23. 82
  24. 15.5
  25. 4029
  26. 2805
  27. 4738
  28. 1260
  29. 1624
  30. 47
  31. 50
  32. 590
  33. 1008
  34. 1326
  35. 40.5
  36. 50
  37. 18.75
  38. 10
  39. 57.5
  40. 2

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