Answer
$\frac{1}{4} ; x\ne 4;$
Work Step by Step
$\frac{\frac{x}{4}-1}{x-4} $
$\frac{\frac{x}{4}-1}{x-4} = \frac{\frac{x-4}{4}}{x-4} ; x \ne 4; $
$= \frac{x-4}{4} \times \frac{1}{x-4} ; x \ne 4; $
$=\frac{1}{4}; x \ne 4;$
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