A rectangular rug with side lengths of 2 feet and 7 feet is placed on a square floor that has an area of 64 square feet. If the surface of the rug does not extend beyond the area of the floor, what fraction of the area of the floor is not covered by the rug? Choose the most appropriate option:  A) a . 3 / 16  B) 1 / 4  C) c . 1 / 2  D) 25 / 32  E) 7 / 8

Rationale: area of the rectangular rug = 2 * 7 = 14 fraction not covered by the rug = ( total area - rug area ) / total area = ( 64 - 14 ) / 64 = 25 / 32 = d
Answer: D