28/57 as a percentage is 49.12%. This number tells you that the fraction is just under half when you look at it on a scale of 100. It’s a quick way to see how big the part is compared to the whole.
When you see 49.12%, you know the part is a little less than 50 out of 100. In everyday terms, if you had 57 pieces of something and you took 28 of them, you’d have taken about half of the total amount.
Remember that percentages are just another way to write fractions, so 28/57 and 49.12% represent the same portion. Use whichever form feels easier for the situation you’re working with.