if 50% of (x-y) = 20% of (x+y) then what percent of x is y?	Pick one
A) 2.5 %	B) 10 %	C) 5 %	D) 15 %	E) 43 %

Rationale: "50 % of ( x - y ) = 20 % of ( x + y ) ( 50 / 100 ) ( x - y ) = ( 20 / 100 ) ( x + y ) 5 ( x - y ) = 2 ( x + y ) 3 x = 7 y x = 7 / 3 y therefore required percentage = ( ( y / x ) x 100 ) % = ( ( y / ( 7 / 3 ) y ) x 100 ) = 43 % answer is e ."
Answer: E