Answer
-$\frac{3}{14}$
Work Step by Step
$\frac{27}{28}$ -$\frac{5}{28}$-$\frac{28}{28}$ =
=$\frac{27-5-28}{28}$
=$\frac{-6}{28}$ =$\frac{-2\times3}{2\times14}$
= -$\frac{3}{14}$
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