12/38 as a percentage is 31.58%. This number tells you how much of a whole the fraction represents when you look at it in terms of hundredths.
The fraction 12/38 can be simplified to 6/19, but whether you keep it as 12/38 or 6/19, the percentage stays the same. It’s useful for quick comparisons, like seeing that 31.58% is a little less than one‑third of a whole.
When you need to talk about parts of a group, using the percentage makes it easier for most people to understand. So, if you had 38 items and 12 of them were selected, you could say that about 31.58% of the items were chosen.
