20 percent of Andrea's living room floor is covered by a carpet that is 4 feet by 9 feet. What is the area of her living room floor?	Choose the correct choice:	A) 14.4	B) 180	C) 50.4	D) 60	E) 90

Rationale: "20 % of area of the floor = 4 * 9 square feet = 36 square feet i . e . 100 % area of floor = ( 36 / 20 ) * 100 = 180 square feet answer : option b"
Answer: B