Answer
$\frac{459}{16}$ in
Work Step by Step
$3feet=3\cdot12=36$ inches.
Thus the remaining peace will be $36-7\frac{1}{4}-\frac{1}{16}=\frac{576}{16}-7\frac{4}{16}-\frac{1}{16}=\frac{575}{16}-\frac{116}{16}=\frac{459}{16}$ inches long
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