21/57 as a percentage is 36.84%. This is the rounded figure you get when you express the fraction in a percent form.
The fraction 21/57 can be reduced to its simplest terms, which is 7/19. It is a proper fraction, meaning its value is less than one, and it represents a little more than one‑third of a whole.
In everyday terms, 36.84% tells you that the part is a little over a third of the total. You’ll see similar percentages in things like discount offers, test scores, or portions of a recipe.
