58/91 as a percentage is 63.74%. This is the rounded value you get when you change the fraction into a percent.
The fraction 58/91 cannot be reduced any further, so it is already in its simplest form. It tells us that for every 91 equal parts, 58 of them are counted.
When we look at 63.74%, we are saying that about 63.74 out of every 100 parts are included. In other words, a little more than six‑tenth of a whole is represented.
You might see this kind of conversion in school grades, surveys, or any place where a part of a whole is expressed as a percent. It gives a quick, easy‑to‑understand picture of the size of the fraction.