62/80 as a percentage is 77.50%. This value tells you how much of a whole the fraction represents when you think in terms of hundredths.
The fraction 62/80 can also be reduced to 31/40, which shows the same proportion in a simpler form. Whether you write it as a fraction or a percentage, the idea is the same: a little less than four‑fifths of the whole.
In everyday use, you might see 77.50% on a report card, a discount tag, or a quiz score. Knowing the percentage makes it easy to compare with other numbers that are already expressed in percent form.