If 25% of(x-y) = 15% of(x+y), then what percent of x is y?  Choose the correct option
A) 20 %	B) 15 %	C) 30 %	D) 25 %	E) none of these

Rationale: "explanation : solution : 25 % of ( x - y ) = 15 % of ( x + y ) 25 ( x - y ) / 100 = 15 ( x + y ) / 100 5 ( x - y ) = 3 ( x + y ) x = 4 y . . ' . required percentage = ( y * 100 / x ) % = y * 100 / 4 y = 25 % answer : d"
Answer: D