Answer
$\frac{1}{4}$
Work Step by Step
$-\frac{1}{5}+\frac{9}{20}$
$=\frac{9}{20}-\frac{1}{5}$
$=\frac{9\times1}{20\times1}-\frac{1\times4}{5\times4}$
$=\frac{9}{20}-\frac{4}{20}$
$=\frac{5}{20}$
$=\frac{1}{4}$
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