The fraction 39/48 as a percentage is 81.25%. This value shows how much of a whole the fraction represents when expressed in percent form.
If you simplify 39/48, you get 13/16, which is an easier way to see the size of the fraction. Both forms tell you that the part is a little more than four‑fifths of the whole.
Percentages like 81.25% are useful in everyday situations—such as calculating grades, discounts, or statistics—because they let you compare numbers quickly and clearly.