Rectangle A has sides a and b, and rectangle B has sides c and d. If a/c=b/d=2/5, what is the ratio of rectangle A’s area to rectangle B’s area? Options:	A) 2 / 5	B) 2 / 25	C) 5 / 2	D) 5 / 4	E) 4 / 25

Rationale: "the area of rectangle a is ab . c = 5 a / 2 and d = 5 b / 2 . the area of rectangle b is cd = 25 ab / 4 . the ratio of rectangle a ' s area to rectangle b ' s area is ab / ( 25 ab / 4 ) = 4 / 25 . the answer is e ."
Answer: E