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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 141 · 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 price goes up by 15% and then goes up by 10% more. By what percent has it gone up in all? =
  2. 2.A shop sells 2780 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  3. 3.A price comes down by 40% and then comes down by 15% more. By what percent has it come down in all? =
  4. 4.A town has 1180 people. Its population grows by 40%. How many people live there now?
  5. 5.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =
  6. 6.A water tank holds 3820 litres. 40% of the water is used. How many litres are left?
  7. 7.The price of a school bag changes from ₹2200 to ₹2530. By what percent did it go up?
  8. 8.A water tank holds 220 litres. 30% of the water is used. How many litres are left?
  9. 9.A town has 200 people. Its population grows by 5%. How many people live there now?
  10. 10.The price of a school bag changes from ₹4720 to ₹4012. By what percent did it come down?
  11. 11.A price comes down by 50% and then comes down by 10% more. By what percent has it come down in all? =
  12. 12.The price of a school bag changes from ₹1580 to ₹1659. By what percent did it go up?
  13. 13.The price of a bicycle is ₹420. It goes up by 20%. What is the new price (in ₹)?
  14. 14.A price goes up by 20% and then comes down by 10%. By what percent has it gone up in all? =
  15. 15.A water tank holds 3940 litres. 10% of the water is used. How many litres are left?
  16. 16.The price of a school bag changes from ₹4480 to ₹4032. By what percent did it come down?
  17. 17.The price of a school bag changes from ₹60 to ₹48. By what percent did it come down?
  18. 18.A water tank holds 3140 litres. 25% of the water is used. How many litres are left?
  19. 19.A price goes up by 20% and then goes up by 5% more. By what percent has it gone up in all? =
  20. 20.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  21. 21.The price of a school bag changes from ₹4360 to ₹6540. By what percent did it go up?
  22. 22.A water tank holds 3100 litres. 5% of the water is used. How many litres are left?
  23. 23.A town has 1280 people. Its population grows by 5%. How many people live there now?
  24. 24.The price of a bicycle is ₹1380. It goes up by 10%. What is the new price (in ₹)?
  25. 25.The price of a school bag changes from ₹1680 to ₹1848. By what percent did it go up?
  26. 26.The price of a school bag changes from ₹4740 to ₹5214. By what percent did it go up?
  27. 27.A price goes up by 30% and then comes down by 5%. By what percent has it gone up in all? =
  28. 28.A town has 1840 people. Its population grows by 25%. How many people live there now?
  29. 29.The price of a school bag changes from ₹720 to ₹360. By what percent did it come down?
  30. 30.A price comes down by 40% and then comes down by 50% more. By what percent has it come down in all? =
  31. 31.A price goes up by 50% and then goes up by 25% more. By what percent has it gone up in all? =
  32. 32.The price of a school bag changes from ₹300 to ₹450. By what percent did it go up?
  33. 33.A price goes up by 25% and then goes up by 50% more. By what percent has it gone up in all? =
  34. 34.A town has 1420 people. Its population grows by 5%. How many people live there now?
  35. 35.A town has 3380 people. Its population grows by 40%. How many people live there now?
  36. 36.A price comes down by 25% and then comes down by 40% more. By what percent has it come down in all? =
  37. 37.A shop sells 220 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  38. 38.A price comes down by 15% and then comes down by 40% more. By what percent has it come down in all? =
  39. 39.A water tank holds 2600 litres. 25% of the water is used. How many litres are left?
  40. 40.A price comes down by 40% and then comes down by 20% more. By what percent has it come down in all? =

Answer key

  1. 26.5
  2. 3614
  3. 49
  4. 1652
  5. 15.5
  6. 2292
  7. 15
  8. 154
  9. 210
  10. 15
  11. 55
  12. 5
  13. 504
  14. 8
  15. 3546
  16. 10
  17. 20
  18. 2355
  19. 26
  20. 21
  21. 50
  22. 2945
  23. 1344
  24. 1518
  25. 10
  26. 10
  27. 23.5
  28. 2300
  29. 50
  30. 70
  31. 87.5
  32. 50
  33. 87.5
  34. 1491
  35. 4732
  36. 55
  37. 242
  38. 49
  39. 1950
  40. 52

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