58 divided by 87 is 66.67%. This is the rounded percentage you get when you change the fraction to a percent. It tells you that the fraction is a little more than two‑thirds of a whole.
The fraction 58/87 cannot be simplified any further, so it stays as it is. When you think of it in everyday terms, it means you have 58 parts out of a total of 87 equal parts.
Knowing the percentage helps when you need to compare this value to other numbers that are already in percent form. The rounded figure 66.67% is easy to read and works well for most practical purposes.