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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 201 · 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 440 litres. 5% of the water is used. How many litres are left?
  2. 2.A price comes down by 30% and then comes down by 30% more. By what percent has it come down in all? =
  3. 3.The price of a school bag changes from ₹4260 to ₹3834. By what percent did it come down?
  4. 4.A water tank holds 1020 litres. 10% of the water is used. How many litres are left?
  5. 5.A price comes down by 50% and then comes down by 20% more. By what percent has it come down in all? =
  6. 6.The price of a school bag changes from ₹4820 to ₹3374. By what percent did it come down?
  7. 7.A price goes up by 15% and then comes down by 10%. By what percent has it gone up in all? =
  8. 8.A water tank holds 3500 litres. 5% of the water is used. How many litres are left?
  9. 9.The price of a school bag changes from ₹600 to ₹660. By what percent did it go up?
  10. 10.A water tank holds 340 litres. 50% of the water is used. How many litres are left?
  11. 11.The price of a bicycle is ₹1460. It goes up by 50%. What is the new price (in ₹)?
  12. 12.The price of a bicycle is ₹3400. It goes up by 40%. What is the new price (in ₹)?
  13. 13.A price comes down by 50% and then comes down by 50% more. By what percent has it come down in all? =
  14. 14.A town has 3040 people. Its population grows by 10%. How many people live there now?
  15. 15.A shop sells 1940 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  16. 16.The price of a school bag changes from ₹2780 to ₹2919. By what percent did it go up?
  17. 17.A water tank holds 900 litres. 10% of the water is used. How many litres are left?
  18. 18.A water tank holds 980 litres. 10% of the water is used. How many litres are left?
  19. 19.The price of a bicycle is ₹1960. It goes up by 50%. What is the new price (in ₹)?
  20. 20.A water tank holds 60 litres. 5% of the water is used. How many litres are left?
  21. 21.A price goes up by 10% and then goes up by 10% more. By what percent has it gone up in all? =
  22. 22.The price of a school bag changes from ₹2520 to ₹2142. By what percent did it come down?
  23. 23.A town has 4040 people. Its population grows by 10%. How many people live there now?
  24. 24.The price of a school bag changes from ₹820 to ₹779. By what percent did it come down?
  25. 25.A shop sells 2460 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  26. 26.The price of a bicycle is ₹400. It goes up by 20%. What is the new price (in ₹)?
  27. 27.A water tank holds 1560 litres. 50% of the water is used. How many litres are left?
  28. 28.A water tank holds 660 litres. 50% of the water is used. How many litres are left?
  29. 29.The price of a school bag changes from ₹3540 to ₹5310. By what percent did it go up?
  30. 30.The price of a school bag changes from ₹4360 to ₹4796. By what percent did it go up?
  31. 31.A price goes up by 30% and then goes up by 25% more. By what percent has it gone up in all? =
  32. 32.A water tank holds 2620 litres. 15% of the water is used. How many litres are left?
  33. 33.A water tank holds 4800 litres. 30% of the water is used. How many litres are left?
  34. 34.A water tank holds 120 litres. 25% of the water is used. How many litres are left?
  35. 35.A price goes up by 20% and then goes up by 30% more. By what percent has it gone up in all? =
  36. 36.A price goes up by 40% and then comes down by 15%. By what percent has it gone up in all? =
  37. 37.A town has 2800 people. Its population grows by 10%. How many people live there now?
  38. 38.A price goes up by 20% and then goes up by 10% more. By what percent has it gone up in all? =
  39. 39.A shop sells 2860 cups of tea a month. Next month it sells 25% more. How many cups does it sell next month?
  40. 40.A price comes down by 40% and then comes down by 30% more. By what percent has it come down in all? =

Answer key

  1. 418
  2. 51
  3. 10
  4. 918
  5. 60
  6. 30
  7. 3.5
  8. 3325
  9. 10
  10. 170
  11. 2190
  12. 4760
  13. 75
  14. 3344
  15. 2231
  16. 5
  17. 810
  18. 882
  19. 2940
  20. 57
  21. 21
  22. 15
  23. 4444
  24. 5
  25. 2829
  26. 480
  27. 780
  28. 330
  29. 50
  30. 10
  31. 62.5
  32. 2227
  33. 3360
  34. 90
  35. 56
  36. 19
  37. 3080
  38. 32
  39. 3575
  40. 58

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