When you convert 28/74 to a percentage, you get 37.84%. This is the rounded value to two decimal places, and it tells you how much of a whole 28 is when compared to 74.
The fraction 28/74 can be simplified by dividing both numbers by 2, giving 14/37. Even in its simplified form, the proportion stays the same, so the percentage remains 37.84%.
Knowing this percentage is useful for quick comparisons. For example, if you scored 28 points out of a possible 74 on a test, you earned about 37.84% of the total marks.