The length of a rectangle is halved, while its breadth is tripled. What is the % change in area? Choose the most appropriate option:
A) 30 %
B) 40 %
C) 50 percent
D) 60 %
E) 70 %

Rationale: "let original length = x and original breadth new length = x . 2 new breadth = 3 y . new area = x x 3 y = 3 xy . 2 2 increase % = 1 xy x 1 x 100 % = 50 % . 2 xy c"
Answer: C