If 20% of (x-y) = 15% of (x+y), then what percent of x is y?  Choices:  A) 50.5 %  B) 44.4 %  C) 22.2 %  D) 14.3 %  E) 25 %

Rationale: "20 % of ( x - y ) = 15 % of ( x + y ) 20 / 100 ( x - y ) = 15 / 100 ( x + y ) 5 x = 35 y required percentage = y / x * 100 = 5 y / 35 y * 100 = 14.28 % answer is d"
Answer: D