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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 660 · 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 town has 3280 people. Its population grows by 5%. How many people live there now?
  2. 2.The price of a school bag changes from ₹160 to ₹176. By what percent did it go up?
  3. 3.A shop sells 2360 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  4. 4.A water tank holds 440 litres. 30% of the water is used. How many litres are left?
  5. 5.The price of a school bag changes from ₹1220 to ₹1159. By what percent did it come down?
  6. 6.A water tank holds 3940 litres. 10% of the water is used. How many litres are left?
  7. 7.The price of a bicycle is ₹1040. It goes up by 40%. What is the new price (in ₹)?
  8. 8.A water tank holds 220 litres. 40% of the water is used. How many litres are left?
  9. 9.A water tank holds 460 litres. 40% of the water is used. How many litres are left?
  10. 10.A water tank holds 3480 litres. 15% of the water is used. How many litres are left?
  11. 11.A town has 4240 people. Its population grows by 30%. How many people live there now?
  12. 12.The price of a school bag changes from ₹2740 to ₹3562. By what percent did it go up?
  13. 13.A price comes down by 5% and then comes down by 50% more. By what percent has it come down in all? =
  14. 14.A price goes up by 25% and then comes down by 15%. By what percent has it gone up in all? =
  15. 15.A water tank holds 920 litres. 15% of the water is used. How many litres are left?
  16. 16.The price of a school bag changes from ₹4940 to ₹3705. By what percent did it come down?
  17. 17.A price comes down by 10% and then comes down by 25% more. By what percent has it come down in all? =
  18. 18.A price comes down by 15% and then comes down by 25% more. By what percent has it come down in all? =
  19. 19.A water tank holds 3960 litres. 50% of the water is used. How many litres are left?
  20. 20.A water tank holds 760 litres. 30% of the water is used. How many litres are left?
  21. 21.A water tank holds 1700 litres. 25% of the water is used. How many litres are left?
  22. 22.A price goes up by 5% and then goes up by 5% more. By what percent has it gone up in all? =
  23. 23.A price goes up by 15% and then goes up by 50% more. By what percent has it gone up in all? =
  24. 24.The price of a school bag changes from ₹2100 to ₹2310. By what percent did it go up?
  25. 25.A town has 1260 people. Its population grows by 40%. How many people live there now?
  26. 26.A water tank holds 180 litres. 5% of the water is used. How many litres are left?
  27. 27.The price of a bicycle is ₹2940. It goes up by 25%. What is the new price (in ₹)?
  28. 28.A price comes down by 40% and then comes down by 20% more. By what percent has it come down in all? =
  29. 29.The price of a bicycle is ₹320. It goes up by 25%. What is the new price (in ₹)?
  30. 30.A shop sells 4120 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  31. 31.A water tank holds 500 litres. 10% of the water is used. How many litres are left?
  32. 32.A price comes down by 20% and then comes down by 10% more. By what percent has it come down in all? =
  33. 33.A price goes up by 50% and then comes down by 10%. By what percent has it gone up in all? =
  34. 34.A water tank holds 680 litres. 50% of the water is used. How many litres are left?
  35. 35.A water tank holds 2520 litres. 10% of the water is used. How many litres are left?
  36. 36.A price goes up by 15% and then goes up by 5% more. By what percent has it gone up in all? =
  37. 37.A shop sells 2120 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  38. 38.A price goes up by 15% and then goes up by 25% more. By what percent has it gone up in all? =
  39. 39.The price of a school bag changes from ₹2060 to ₹2163. By what percent did it go up?
  40. 40.A water tank holds 100 litres. 15% of the water is used. How many litres are left?

Answer key

  1. 3444
  2. 10
  3. 3068
  4. 308
  5. 5
  6. 3546
  7. 1456
  8. 132
  9. 276
  10. 2958
  11. 5512
  12. 30
  13. 52.5
  14. 6.25
  15. 782
  16. 25
  17. 32.5
  18. 36.25
  19. 1980
  20. 532
  21. 1275
  22. 10.25
  23. 72.5
  24. 10
  25. 1764
  26. 171
  27. 3675
  28. 52
  29. 400
  30. 4532
  31. 450
  32. 28
  33. 35
  34. 340
  35. 2268
  36. 20.75
  37. 2544
  38. 43.75
  39. 5
  40. 85

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