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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 482 · 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 shop sells 1160 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  2. 2.The price of a school bag changes from ₹3600 to ₹2520. By what percent did it come down?
  3. 3.A water tank holds 1700 litres. 10% of the water is used. How many litres are left?
  4. 4.A water tank holds 780 litres. 40% of the water is used. How many litres are left?
  5. 5.A shop sells 3900 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  6. 6.A shop sells 4700 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  7. 7.A water tank holds 800 litres. 40% of the water is used. How many litres are left?
  8. 8.A price goes up by 50% and then goes up by 20% more. By what percent has it gone up in all? =
  9. 9.A shop sells 540 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  10. 10.The price of a bicycle is ₹2960. It goes up by 15%. What is the new price (in ₹)?
  11. 11.A town has 3000 people. Its population grows by 20%. How many people live there now?
  12. 12.A town has 2540 people. Its population grows by 50%. How many people live there now?
  13. 13.A price comes down by 25% and then comes down by 5% more. By what percent has it come down in all? =
  14. 14.The price of a school bag changes from ₹3940 to ₹1970. By what percent did it come down?
  15. 15.A water tank holds 4820 litres. 20% of the water is used. How many litres are left?
  16. 16.The price of a school bag changes from ₹2580 to ₹1806. By what percent did it come down?
  17. 17.A water tank holds 560 litres. 10% of the water is used. How many litres are left?
  18. 18.A price goes up by 50% and then goes up by 10% more. By what percent has it gone up in all? =
  19. 19.The price of a bicycle is ₹120. It goes up by 20%. What is the new price (in ₹)?
  20. 20.A town has 1780 people. Its population grows by 40%. How many people live there now?
  21. 21.A shop sells 1580 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  22. 22.A price comes down by 10% and then comes down by 30% more. By what percent has it come down in all? =
  23. 23.A shop sells 700 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  24. 24.The price of a school bag changes from ₹2360 to ₹2596. By what percent did it go up?
  25. 25.A price goes up by 10% and then goes up by 20% more. By what percent has it gone up in all? =
  26. 26.The price of a school bag changes from ₹2260 to ₹3164. By what percent did it go up?
  27. 27.The price of a school bag changes from ₹2100 to ₹2730. By what percent did it go up?
  28. 28.A water tank holds 2020 litres. 20% of the water is used. How many litres are left?
  29. 29.A water tank holds 960 litres. 30% of the water is used. How many litres are left?
  30. 30.A water tank holds 3860 litres. 30% of the water is used. How many litres are left?
  31. 31.The price of a school bag changes from ₹1400 to ₹1050. By what percent did it come down?
  32. 32.A town has 4300 people. Its population grows by 5%. How many people live there now?
  33. 33.The price of a bicycle is ₹3760. It goes up by 25%. What is the new price (in ₹)?
  34. 34.The price of a bicycle is ₹840. It goes up by 15%. What is the new price (in ₹)?
  35. 35.A town has 3300 people. Its population grows by 25%. How many people live there now?
  36. 36.A price goes up by 25% and then goes up by 40% more. By what percent has it gone up in all? =
  37. 37.The price of a school bag changes from ₹4080 to ₹3672. By what percent did it come down?
  38. 38.The price of a school bag changes from ₹720 to ₹648. By what percent did it come down?
  39. 39.A water tank holds 3060 litres. 50% of the water is used. How many litres are left?
  40. 40.A water tank holds 4380 litres. 5% of the water is used. How many litres are left?

Answer key

  1. 1508
  2. 30
  3. 1530
  4. 468
  5. 5460
  6. 6110
  7. 480
  8. 80
  9. 567
  10. 3404
  11. 3600
  12. 3810
  13. 28.75
  14. 50
  15. 3856
  16. 30
  17. 504
  18. 65
  19. 144
  20. 2492
  21. 1817
  22. 37
  23. 805
  24. 10
  25. 32
  26. 40
  27. 30
  28. 1616
  29. 672
  30. 2702
  31. 25
  32. 4515
  33. 4700
  34. 966
  35. 4125
  36. 75
  37. 10
  38. 10
  39. 1530
  40. 4161

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