What number should be placed in the $\square$ to make the equation $\frac{1}{2}=\frac{\square}{8}$ true?
(A) 1
(B) 2
(C) 4
(D) 6
(E) 7
The fraction $\frac{4}{8}$ is equivalent to the fraction $\frac{1}{2}$.

Therefore, the number 4 should be placed in the $\square$.

ANSWER: $(\mathrm{C})$