Which method can be used to find the dimensions of the original rectangle

A. 18-5/8=17 3/8 inches and 12-5/8= 11 3/8 in.
B. 5/8 / 18= 5/144 in. and 5/8 / 12=5/96in.
C. 18x5/8=11 1/4 in. and 12x5/8=7 1/2 in.
D. 18 / 5/8=28 4/5 in. and 12 / 5/8= 19 1/5 in.