In the diagram, square $P Q R S$ is divided into four identical squares. What percentage of square $P Q R S$ is shaded?
(A) $33 \%$
(B) $40 \%$
(C) $25 \%$
(D) $50 \%$
(E) $15 \%$

![](https://cdn.mathpix.com/cropped/2024_04_20_46ead6524a8d61e21c51g-020.jpg?height=288&width=309&top_left_y=875&top_left_x=1342)
One of four identical squares is shaded and so the fraction of square $P Q R S$ that is shaded is $\frac{1}{4}$ which is equivalent to $25 \%$.

ANSWER: (C)