3/19 as a percentage is 15.79%. This value tells you how much of a whole 3 parts out of 19 represent when you look at it on a scale of 100.
When you see 15.79% on a chart or a report, it means the same thing as the fraction 3/19. It’s just a different way of showing the size of the part compared to the whole.
In everyday language, you can say that something is about sixteen percent of a total when you round it a little. That’s close enough for most casual uses.
Remember, the fraction and the percentage give you the same information—just expressed in different forms.