57/90 as a percentage is 63.33%. This value tells you how much of a whole the fraction represents when you look at it in terms of hundredths.
The fraction 57/90 can also be simplified to 19/30, which still points to the same proportion of a whole. Whether you write it as a fraction or a percentage, the meaning stays the same: a little over half of the total.
Using percentages like 63.33% makes it easy to compare this amount with other values, especially in charts or reports. It’s a quick way to see the size of the part relative to the whole.