The side lengths of a right triangle measure \(x,x+y\), \(x-y\) and units where \(0 < y < x\). What is the value of \(\)\(y \div x\)? Express your answer as a common fraction.
(x +y)^2 = x^2 + ( x - y)^2
x^2 + 2xy + y^2 = x^2 + x^2 - 2xy + y^2
4xy = x^2
4y = x
y / x = 1/4
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