if 40% of (x-y) = 30% of (x+y) then what percent of x is y?
Choose the correct choice from the following answers
A) 2.5 %	B) 10 %	C) 5 %	D) 14 %	E) 25 %

Rationale: 40 % of ( x - y ) = 30 % of ( x + y ) ( 40 / 100 ) ( x - y ) = ( 30 / 100 ) ( x + y ) 4 ( x - y ) = 3 ( x + y ) x = 7 y x = 7 y therefore required percentage = ( ( y / x ) x 100 ) % = ( ( y / 7 y ) x 100 ) = 14 % answer is d .
Answer: D