27/47 as a percentage is 57.45 %. This is the rounded value you’ll see most often when the fraction is expressed in percent form.
The fraction 27/47 is an improper fraction that can’t be reduced any further, so it stays exactly as it is. It sits a little over one‑half of a whole, which matches the 57.45 % you see when it’s turned into a percent.
People use this kind of conversion when they need to compare parts of a set to a whole, like in surveys or test scores. Remember that the percent version is just another way to show the same size, only in a format that’s easy to read on a 0‑100 scale.