When you look at the fraction 57/71, you get 80.28% as its percentage value. This is the rounded result you would see on most calculators or reports.
The fraction 57/71 is a bit more than three‑quarters, because 57 is close to three‑quarters of 71. It shows up in situations where you compare a part (57) to a whole (71), such as scores, survey results, or portions of a batch.
Knowing the percentage makes it easier to understand at a glance. 80.28% tells you that the part is just a little under four‑fifths of the whole, which is a useful way to communicate the size of the portion in everyday language.