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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 100 · 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 ₹1300 to ₹1950. By what percent did it go up?
  2. 2.The price of a school bag changes from ₹4560 to ₹4332. By what percent did it come down?
  3. 3.A shop sells 4380 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  4. 4.A price comes down by 10% and then comes down by 15% more. By what percent has it come down in all? =
  5. 5.A town has 140 people. Its population grows by 10%. How many people live there now?
  6. 6.A water tank holds 1800 litres. 15% of the water is used. How many litres are left?
  7. 7.A water tank holds 2920 litres. 20% of the water is used. How many litres are left?
  8. 8.A price goes up by 15% and then goes up by 25% more. By what percent has it gone up in all? =
  9. 9.A shop sells 3180 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  10. 10.The price of a bicycle is ₹2180. It goes up by 10%. What is the new price (in ₹)?
  11. 11.A water tank holds 3720 litres. 10% of the water is used. How many litres are left?
  12. 12.A water tank holds 1300 litres. 30% of the water is used. How many litres are left?
  13. 13.A water tank holds 2480 litres. 30% of the water is used. How many litres are left?
  14. 14.The price of a bicycle is ₹4260. It goes up by 5%. What is the new price (in ₹)?
  15. 15.A water tank holds 1760 litres. 30% of the water is used. How many litres are left?
  16. 16.A price goes up by 15% and then goes up by 30% more. By what percent has it gone up in all? =
  17. 17.The price of a bicycle is ₹4780. It goes up by 15%. What is the new price (in ₹)?
  18. 18.A water tank holds 3500 litres. 50% of the water is used. How many litres are left?
  19. 19.A town has 3720 people. Its population grows by 50%. How many people live there now?
  20. 20.A town has 580 people. Its population grows by 50%. How many people live there now?
  21. 21.A price goes up by 15% and then comes down by 10%. By what percent has it gone up in all? =
  22. 22.A water tank holds 2320 litres. 30% of the water is used. How many litres are left?
  23. 23.A price goes up by 30% and then goes up by 30% more. By what percent has it gone up in all? =
  24. 24.A town has 3700 people. Its population grows by 15%. How many people live there now?
  25. 25.A shop sells 900 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  26. 26.The price of a school bag changes from ₹1940 to ₹2328. By what percent did it go up?
  27. 27.A town has 2660 people. Its population grows by 10%. How many people live there now?
  28. 28.The price of a school bag changes from ₹3000 to ₹3750. By what percent did it go up?
  29. 29.The price of a school bag changes from ₹1100 to ₹550. By what percent did it come down?
  30. 30.The price of a school bag changes from ₹4920 to ₹4428. By what percent did it come down?
  31. 31.The price of a school bag changes from ₹60 to ₹45. By what percent did it come down?
  32. 32.A price comes down by 30% and then comes down by 5% more. By what percent has it come down in all? =
  33. 33.A town has 4620 people. Its population grows by 30%. How many people live there now?
  34. 34.A water tank holds 1100 litres. 5% of the water is used. How many litres are left?
  35. 35.The price of a bicycle is ₹980. It goes up by 20%. What is the new price (in ₹)?
  36. 36.A price goes up by 50% and then goes up by 25% more. By what percent has it gone up in all? =
  37. 37.A town has 2440 people. Its population grows by 30%. How many people live there now?
  38. 38.A shop sells 360 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  39. 39.A shop sells 140 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  40. 40.The price of a school bag changes from ₹1020 to ₹1428. By what percent did it go up?

Answer key

  1. 50
  2. 5
  3. 4599
  4. 23.5
  5. 154
  6. 1530
  7. 2336
  8. 43.75
  9. 4452
  10. 2398
  11. 3348
  12. 910
  13. 1736
  14. 4473
  15. 1232
  16. 49.5
  17. 5497
  18. 1750
  19. 5580
  20. 870
  21. 3.5
  22. 1624
  23. 69
  24. 4255
  25. 990
  26. 20
  27. 2926
  28. 25
  29. 50
  30. 10
  31. 25
  32. 33.5
  33. 6006
  34. 1045
  35. 1176
  36. 87.5
  37. 3172
  38. 378
  39. 196
  40. 40

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