5/8 is already a fraction. It represents five parts out of eight equal parts. In this fraction, 5 is the numerator, and 8 is the denominator. The numerator indicates how many parts we have, while the denominator shows the total number of equal parts the whole is divided into.
Fractions like 5/8 are used to represent parts of a whole. For example, if you have a pizza cut into 8 equal slices and you take 5 slices, you have 5/8 of the pizza.