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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 740 · 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 360 litres. 20% of the water is used. How many litres are left?
  2. 2.The price of a school bag changes from ₹1920 to ₹2112. By what percent did it go up?
  3. 3.A water tank holds 3400 litres. 30% of the water is used. How many litres are left?
  4. 4.A water tank holds 1640 litres. 15% of the water is used. How many litres are left?
  5. 5.A price goes up by 20% and then comes down by 15%. By what percent has it gone up in all? =
  6. 6.A price goes up by 30% and then comes down by 5%. By what percent has it gone up in all? =
  7. 7.A price comes down by 10% and then comes down by 25% more. By what percent has it come down in all? =
  8. 8.The price of a school bag changes from ₹2680 to ₹2546. By what percent did it come down?
  9. 9.A price goes up by 30% and then comes down by 10%. By what percent has it gone up in all? =
  10. 10.The price of a bicycle is ₹4260. It goes up by 20%. What is the new price (in ₹)?
  11. 11.The price of a school bag changes from ₹2320 to ₹1624. By what percent did it come down?
  12. 12.A price goes up by 25% and then goes up by 5% more. By what percent has it gone up in all? =
  13. 13.A water tank holds 2520 litres. 25% of the water is used. How many litres are left?
  14. 14.A price goes up by 40% and then goes up by 20% more. By what percent has it gone up in all? =
  15. 15.A price comes down by 30% and then comes down by 10% more. By what percent has it come down in all? =
  16. 16.A water tank holds 1900 litres. 5% of the water is used. How many litres are left?
  17. 17.A town has 2920 people. Its population grows by 20%. How many people live there now?
  18. 18.The price of a school bag changes from ₹4760 to ₹7140. By what percent did it go up?
  19. 19.A water tank holds 1440 litres. 15% of the water is used. How many litres are left?
  20. 20.A water tank holds 120 litres. 10% of the water is used. How many litres are left?
  21. 21.A town has 2260 people. Its population grows by 25%. How many people live there now?
  22. 22.The price of a school bag changes from ₹340 to ₹425. By what percent did it go up?
  23. 23.A water tank holds 5000 litres. 10% of the water is used. How many litres are left?
  24. 24.The price of a school bag changes from ₹4620 to ₹2310. By what percent did it come down?
  25. 25.A water tank holds 4860 litres. 20% of the water is used. How many litres are left?
  26. 26.A shop sells 2300 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  27. 27.The price of a school bag changes from ₹1500 to ₹1200. By what percent did it come down?
  28. 28.A price goes up by 5% and then goes up by 50% more. By what percent has it gone up in all? =
  29. 29.A shop sells 4180 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  30. 30.A water tank holds 2680 litres. 25% of the water is used. How many litres are left?
  31. 31.A town has 1580 people. Its population grows by 10%. How many people live there now?
  32. 32.A price goes up by 50% and then comes down by 25%. By what percent has it gone up in all? =
  33. 33.The price of a school bag changes from ₹4520 to ₹3390. By what percent did it come down?
  34. 34.A shop sells 1240 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  35. 35.A water tank holds 3220 litres. 10% of the water is used. How many litres are left?
  36. 36.A water tank holds 4700 litres. 10% of the water is used. How many litres are left?
  37. 37.A town has 4060 people. Its population grows by 10%. How many people live there now?
  38. 38.A water tank holds 4340 litres. 15% of the water is used. How many litres are left?
  39. 39.A water tank holds 3100 litres. 20% of the water is used. How many litres are left?
  40. 40.A price comes down by 10% and then comes down by 40% more. By what percent has it come down in all? =

Answer key

  1. 288
  2. 10
  3. 2380
  4. 1394
  5. 2
  6. 23.5
  7. 32.5
  8. 5
  9. 17
  10. 5112
  11. 30
  12. 31.25
  13. 1890
  14. 68
  15. 37
  16. 1805
  17. 3504
  18. 50
  19. 1224
  20. 108
  21. 2825
  22. 25
  23. 4500
  24. 50
  25. 3888
  26. 2415
  27. 20
  28. 57.5
  29. 5016
  30. 2010
  31. 1738
  32. 12.5
  33. 25
  34. 1488
  35. 2898
  36. 4230
  37. 4466
  38. 3689
  39. 2480
  40. 46

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