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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 887 · 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.The price of a school bag changes from ₹2200 to ₹1650. By what percent did it come down?
  2. 2.A price goes up by 5% and then goes up by 50% more. By what percent has it gone up in all? =
  3. 3.A water tank holds 3340 litres. 15% of the water is used. How many litres are left?
  4. 4.A water tank holds 2700 litres. 10% of the water is used. How many litres are left?
  5. 5.A water tank holds 4280 litres. 25% of the water is used. How many litres are left?
  6. 6.A price goes up by 30% and then comes down by 15%. By what percent has it gone up in all? =
  7. 7.The price of a bicycle is ₹1460. It goes up by 40%. What is the new price (in ₹)?
  8. 8.A price comes down by 10% and then comes down by 15% more. By what percent has it come down in all? =
  9. 9.A water tank holds 1440 litres. 50% of the water is used. How many litres are left?
  10. 10.The price of a bicycle is ₹2100. It goes up by 10%. What is the new price (in ₹)?
  11. 11.The price of a bicycle is ₹2640. It goes up by 25%. What is the new price (in ₹)?
  12. 12.A price goes up by 50% and then goes up by 30% more. By what percent has it gone up in all? =
  13. 13.The price of a school bag changes from ₹960 to ₹768. By what percent did it come down?
  14. 14.A water tank holds 4520 litres. 50% of the water is used. How many litres are left?
  15. 15.A water tank holds 3680 litres. 50% of the water is used. How many litres are left?
  16. 16.A water tank holds 840 litres. 10% of the water is used. How many litres are left?
  17. 17.The price of a bicycle is ₹1740. It goes up by 5%. What is the new price (in ₹)?
  18. 18.The price of a school bag changes from ₹4280 to ₹2996. By what percent did it come down?
  19. 19.The price of a school bag changes from ₹1580 to ₹1106. By what percent did it come down?
  20. 20.A price comes down by 10% and then comes down by 5% more. By what percent has it come down in all? =
  21. 21.A price comes down by 5% and then comes down by 40% more. By what percent has it come down in all? =
  22. 22.A water tank holds 200 litres. 25% of the water is used. How many litres are left?
  23. 23.A water tank holds 240 litres. 40% of the water is used. How many litres are left?
  24. 24.A town has 3440 people. Its population grows by 20%. How many people live there now?
  25. 25.A water tank holds 1080 litres. 30% of the water is used. How many litres are left?
  26. 26.A price comes down by 5% and then comes down by 15% more. By what percent has it come down in all? =
  27. 27.A water tank holds 1060 litres. 15% of the water is used. How many litres are left?
  28. 28.A price goes up by 20% and then goes up by 5% more. By what percent has it gone up in all? =
  29. 29.A water tank holds 2140 litres. 50% of the water is used. How many litres are left?
  30. 30.A water tank holds 2280 litres. 25% of the water is used. How many litres are left?
  31. 31.A price goes up by 5% and then goes up by 15% more. By what percent has it gone up in all? =
  32. 32.A shop sells 2100 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  33. 33.The price of a school bag changes from ₹720 to ₹648. By what percent did it come down?
  34. 34.A shop sells 2120 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  35. 35.A water tank holds 680 litres. 5% of the water is used. How many litres are left?
  36. 36.The price of a school bag changes from ₹340 to ₹170. By what percent did it come down?
  37. 37.A town has 400 people. Its population grows by 50%. How many people live there now?
  38. 38.A town has 1580 people. Its population grows by 5%. How many people live there now?
  39. 39.A price goes up by 5% and then goes up by 25% more. By what percent has it gone up in all? =
  40. 40.A water tank holds 3600 litres. 20% of the water is used. How many litres are left?

Answer key

  1. 25
  2. 57.5
  3. 2839
  4. 2430
  5. 3210
  6. 10.5
  7. 2044
  8. 23.5
  9. 720
  10. 2310
  11. 3300
  12. 95
  13. 20
  14. 2260
  15. 1840
  16. 756
  17. 1827
  18. 30
  19. 30
  20. 14.5
  21. 43
  22. 150
  23. 144
  24. 4128
  25. 756
  26. 19.25
  27. 901
  28. 26
  29. 1070
  30. 1710
  31. 20.75
  32. 2625
  33. 10
  34. 2226
  35. 646
  36. 50
  37. 600
  38. 1659
  39. 31.25
  40. 2880

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