Explanation:
The attached figure shows a circle. In this circle, some of the part is shaded with a color.
In the figure, we have drawn lines from red color. It shows that there is 1 part shaded out of 4 parts.
Carla said The shaded angle represents 1/4 of the circle while Adam states the shaded angle represents 3/8 of the circle.
The fraction for the shaded part is 1/4. Hence, Carla is correct.