When you change the fraction 6/18 to a percent, you get 33.33%.
The fraction 6/18 can be reduced to 1/3, which is a common part of a whole. Seeing it as a percent makes it easier to compare with other numbers that are already in percent form.
In everyday life you might use this percentage when you need to show one‑third of a budget, a class size, or any other quantity split into three equal parts. It’s a quick way to understand the share without doing extra math.