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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 416 · 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 ₹3840 to ₹4800. By what percent did it go up?
  2. 2.A town has 1180 people. Its population grows by 25%. How many people live there now?
  3. 3.The price of a school bag changes from ₹200 to ₹140. By what percent did it come down?
  4. 4.A water tank holds 2620 litres. 50% of the water is used. How many litres are left?
  5. 5.A town has 640 people. Its population grows by 5%. How many people live there now?
  6. 6.A price comes down by 25% and then comes down by 10% more. By what percent has it come down in all? =
  7. 7.A water tank holds 840 litres. 50% of the water is used. How many litres are left?
  8. 8.A water tank holds 1680 litres. 20% of the water is used. How many litres are left?
  9. 9.A water tank holds 4460 litres. 5% of the water is used. How many litres are left?
  10. 10.A price goes up by 10% and then comes down by 5%. By what percent has it gone up in all? =
  11. 11.A price goes up by 50% and then goes up by 10% more. By what percent has it gone up in all? =
  12. 12.The price of a bicycle is ₹4720. It goes up by 30%. What is the new price (in ₹)?
  13. 13.A town has 4260 people. Its population grows by 15%. How many people live there now?
  14. 14.A price goes up by 15% and then goes up by 25% more. By what percent has it gone up in all? =
  15. 15.The price of a school bag changes from ₹2280 to ₹2622. By what percent did it go up?
  16. 16.A water tank holds 2360 litres. 20% of the water is used. How many litres are left?
  17. 17.The price of a bicycle is ₹740. It goes up by 25%. What is the new price (in ₹)?
  18. 18.A shop sells 2980 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  19. 19.The price of a school bag changes from ₹4400 to ₹2200. By what percent did it come down?
  20. 20.The price of a bicycle is ₹3140. It goes up by 40%. What is the new price (in ₹)?
  21. 21.The price of a school bag changes from ₹4220 to ₹4009. By what percent did it come down?
  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 water tank holds 280 litres. 5% of the water is used. How many litres are left?
  24. 24.The price of a school bag changes from ₹4760 to ₹5950. By what percent did it go up?
  25. 25.A price goes up by 20% and then goes up by 40% more. By what percent has it gone up in all? =
  26. 26.A water tank holds 900 litres. 25% of the water is used. How many litres are left?
  27. 27.The price of a school bag changes from ₹1100 to ₹550. By what percent did it come down?
  28. 28.A price goes up by 25% and then goes up by 15% more. By what percent has it gone up in all? =
  29. 29.A shop sells 800 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  30. 30.A shop sells 260 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  31. 31.The price of a school bag changes from ₹4880 to ₹6100. By what percent did it go up?
  32. 32.A water tank holds 3080 litres. 20% of the water is used. How many litres are left?
  33. 33.A price comes down by 5% and then comes down by 10% more. By what percent has it come down in all? =
  34. 34.A town has 2520 people. Its population grows by 30%. How many people live there now?
  35. 35.The price of a school bag changes from ₹3440 to ₹4128. By what percent did it go up?
  36. 36.The price of a school bag changes from ₹2620 to ₹3013. By what percent did it go up?
  37. 37.The price of a school bag changes from ₹1740 to ₹1827. By what percent did it go up?
  38. 38.A water tank holds 3320 litres. 50% of the water is used. How many litres are left?
  39. 39.A water tank holds 1880 litres. 5% of the water is used. How many litres are left?
  40. 40.A water tank holds 2020 litres. 5% of the water is used. How many litres are left?

Answer key

  1. 25
  2. 1475
  3. 30
  4. 1310
  5. 672
  6. 32.5
  7. 420
  8. 1344
  9. 4237
  10. 4.5
  11. 65
  12. 6136
  13. 4899
  14. 43.75
  15. 15
  16. 1888
  17. 925
  18. 3725
  19. 50
  20. 4396
  21. 5
  22. 10.25
  23. 266
  24. 25
  25. 68
  26. 675
  27. 50
  28. 43.75
  29. 920
  30. 299
  31. 25
  32. 2464
  33. 14.5
  34. 3276
  35. 20
  36. 15
  37. 5
  38. 1660
  39. 1786
  40. 1919

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