57/66 as a percentage is 86.36%. This fraction represents a little more than four‑fifths of a whole, and when you look at it as a percent it’s easy to see just how large it is.
If you simplify 57/66, you get 19/22, which still keeps the same value. Whether you write it as a fraction or a percent, the size of the part stays the same, just shown in a different way.
In everyday situations, 86.36% can be thought of as a high score on a test, a strong success rate, or a large portion of a group. It’s a quick way to understand that the fraction is close to one whole.