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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 376 · 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 price goes up by 50% and then goes up by 5% more. By what percent has it gone up in all? =
  2. 2.A water tank holds 1000 litres. 15% of the water is used. How many litres are left?
  3. 3.A town has 4760 people. Its population grows by 30%. How many people live there now?
  4. 4.A shop sells 1340 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  5. 5.A water tank holds 4840 litres. 25% of the water is used. How many litres are left?
  6. 6.The price of a school bag changes from ₹3600 to ₹4500. By what percent did it go up?
  7. 7.A water tank holds 1320 litres. 10% of the water is used. How many litres are left?
  8. 8.A town has 3060 people. Its population grows by 25%. How many people live there now?
  9. 9.The price of a school bag changes from ₹2300 to ₹2185. By what percent did it come down?
  10. 10.A water tank holds 260 litres. 25% of the water is used. How many litres are left?
  11. 11.A water tank holds 2280 litres. 15% of the water is used. How many litres are left?
  12. 12.The price of a school bag changes from ₹2320 to ₹1624. By what percent did it come down?
  13. 13.A water tank holds 4580 litres. 30% of the water is used. How many litres are left?
  14. 14.The price of a school bag changes from ₹4180 to ₹3344. By what percent did it come down?
  15. 15.A water tank holds 1300 litres. 10% of the water is used. How many litres are left?
  16. 16.The price of a school bag changes from ₹3640 to ₹4004. By what percent did it go up?
  17. 17.A price goes up by 25% and then goes up by 20% more. By what percent has it gone up in all? =
  18. 18.The price of a school bag changes from ₹2140 to ₹1926. By what percent did it come down?
  19. 19.A shop sells 220 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  20. 20.A price goes up by 10% and then goes up by 50% more. By what percent has it gone up in all? =
  21. 21.The price of a school bag changes from ₹4840 to ₹4598. By what percent did it come down?
  22. 22.A water tank holds 140 litres. 30% of the water is used. How many litres are left?
  23. 23.A price goes up by 50% and then comes down by 15%. By what percent has it gone up in all? =
  24. 24.The price of a bicycle is ₹4020. It goes up by 5%. What is the new price (in ₹)?
  25. 25.A price goes up by 5% and then goes up by 30% more. By what percent has it gone up in all? =
  26. 26.The price of a school bag changes from ₹1300 to ₹1820. By what percent did it go up?
  27. 27.A water tank holds 2660 litres. 5% of the water is used. How many litres are left?
  28. 28.A town has 1080 people. Its population grows by 20%. How many people live there now?
  29. 29.The price of a school bag changes from ₹4440 to ₹5772. By what percent did it go up?
  30. 30.The price of a school bag changes from ₹80 to ₹88. By what percent did it go up?
  31. 31.A price goes up by 25% and then goes up by 25% more. By what percent has it gone up in all? =
  32. 32.A price goes up by 20% and then goes up by 50% more. By what percent has it gone up in all? =
  33. 33.The price of a school bag changes from ₹4320 to ₹3024. By what percent did it come down?
  34. 34.The price of a bicycle is ₹2260. It goes up by 5%. What is the new price (in ₹)?
  35. 35.A town has 2380 people. Its population grows by 10%. How many people live there now?
  36. 36.A price goes up by 10% and then goes up by 5% more. By what percent has it gone up in all? =
  37. 37.The price of a bicycle is ₹3260. It goes up by 20%. What is the new price (in ₹)?
  38. 38.A price goes up by 50% and then comes down by 30%. By what percent has it gone up in all? =
  39. 39.A shop sells 1280 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  40. 40.A price goes up by 10% and then goes up by 25% more. By what percent has it gone up in all? =

Answer key

  1. 57.5
  2. 850
  3. 6188
  4. 1876
  5. 3630
  6. 25
  7. 1188
  8. 3825
  9. 5
  10. 195
  11. 1938
  12. 30
  13. 3206
  14. 20
  15. 1170
  16. 10
  17. 50
  18. 10
  19. 275
  20. 65
  21. 5
  22. 98
  23. 27.5
  24. 4221
  25. 36.5
  26. 40
  27. 2527
  28. 1296
  29. 30
  30. 10
  31. 56.25
  32. 80
  33. 30
  34. 2373
  35. 2618
  36. 15.5
  37. 3912
  38. 5
  39. 1472
  40. 37.5

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