The plane is tiled by congruent squares and congruent pentagons as indicated. The percent of the plane that is enclosed by the pentagons is closest to $\text{(A) }50 \qquad$ $ \text{(B) }52 \qquad$ $ \text{(C) }54 \qquad$ $ \text{(D) }56 \qquad$ $ \text{(E) }58$