The number that goes into the $\square$ to make $\frac{3}{7}=\frac{\square}{63}$ true is
(A) 27
(B) 9
(C) 59
(D) 63
(E) 3
The denominators of the two fractions are 7 and 63 .

Since $7 \times 9=63$, then we must also multiply the numerator 3 by 9 so that the fractions are equivalent.

That is, $\frac{3}{7}=\frac{3 \times 9}{7 \times 9}=\frac{27}{63}$.

Therefore, the number that goes into the $\square$ so that the statement true is 27 .

ANSWER: (A)