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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 593 · 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 3580 litres. 5% of the water is used. How many litres are left?
  2. 2.A water tank holds 1120 litres. 40% of the water is used. How many litres are left?
  3. 3.The price of a school bag changes from ₹2200 to ₹1980. By what percent did it come down?
  4. 4.A price goes up by 15% and then goes up by 20% more. By what percent has it gone up in all? =
  5. 5.The price of a bicycle is ₹960. It goes up by 15%. What is the new price (in ₹)?
  6. 6.A water tank holds 3720 litres. 10% of the water is used. How many litres are left?
  7. 7.A town has 1100 people. Its population grows by 15%. How many people live there now?
  8. 8.A price comes down by 10% and then comes down by 25% more. By what percent has it come down in all? =
  9. 9.A water tank holds 2440 litres. 20% of the water is used. How many litres are left?
  10. 10.A price goes up by 25% and then goes up by 15% more. By what percent has it gone up in all? =
  11. 11.A water tank holds 760 litres. 20% of the water is used. How many litres are left?
  12. 12.A shop sells 4260 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  13. 13.A price comes down by 40% and then comes down by 10% more. By what percent has it come down in all? =
  14. 14.A shop sells 3920 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  15. 15.The price of a school bag changes from ₹2580 to ₹2451. By what percent did it come down?
  16. 16.A price comes down by 10% and then comes down by 10% more. By what percent has it come down in all? =
  17. 17.A shop sells 340 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  18. 18.The price of a school bag changes from ₹4400 to ₹3740. By what percent did it come down?
  19. 19.A price goes up by 40% and then goes up by 40% more. By what percent has it gone up in all? =
  20. 20.A water tank holds 3760 litres. 30% of the water is used. How many litres are left?
  21. 21.The price of a bicycle is ₹2880. It goes up by 15%. What is the new price (in ₹)?
  22. 22.The price of a school bag changes from ₹1280 to ₹1472. By what percent did it go up?
  23. 23.A water tank holds 380 litres. 50% of the water is used. How many litres are left?
  24. 24.A water tank holds 2520 litres. 25% of the water is used. How many litres are left?
  25. 25.A price goes up by 20% and then goes up by 20% more. By what percent has it gone up in all? =
  26. 26.The price of a bicycle is ₹4060. It goes up by 10%. What is the new price (in ₹)?
  27. 27.The price of a school bag changes from ₹60 to ₹36. By what percent did it come down?
  28. 28.The price of a school bag changes from ₹1220 to ₹1403. By what percent did it go up?
  29. 29.A water tank holds 220 litres. 40% of the water is used. How many litres are left?
  30. 30.A water tank holds 920 litres. 40% of the water is used. How many litres are left?
  31. 31.The price of a school bag changes from ₹1740 to ₹1827. By what percent did it go up?
  32. 32.The price of a bicycle is ₹2740. It goes up by 25%. What is the new price (in ₹)?
  33. 33.A shop sells 4740 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  34. 34.The price of a school bag changes from ₹700 to ₹770. By what percent did it go up?
  35. 35.The price of a school bag changes from ₹260 to ₹286. By what percent did it go up?
  36. 36.A water tank holds 1800 litres. 5% of the water is used. How many litres are left?
  37. 37.A town has 500 people. Its population grows by 25%. How many people live there now?
  38. 38.A water tank holds 1800 litres. 15% of the water is used. How many litres are left?
  39. 39.A town has 3240 people. Its population grows by 25%. How many people live there now?
  40. 40.The price of a school bag changes from ₹3820 to ₹3247. By what percent did it come down?

Answer key

  1. 3401
  2. 672
  3. 10
  4. 38
  5. 1104
  6. 3348
  7. 1265
  8. 32.5
  9. 1952
  10. 43.75
  11. 608
  12. 4473
  13. 46
  14. 4312
  15. 5
  16. 19
  17. 408
  18. 15
  19. 96
  20. 2632
  21. 3312
  22. 15
  23. 190
  24. 1890
  25. 44
  26. 4466
  27. 40
  28. 15
  29. 132
  30. 552
  31. 5
  32. 3425
  33. 5451
  34. 10
  35. 10
  36. 1710
  37. 625
  38. 1530
  39. 4050
  40. 15

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