Answer
-$\frac{1}{75}$
Work Step by Step
$\frac{4}{15}$ $\times$-$\frac{1}{20}$=
=-$\frac{4\times1}{15\times20}$=-$\frac{4\times1}{20\times15}$=
=-$\frac{4\times1}{4\times5\times15}$=-$\frac{1}{5\times15}$=
=-$\frac{1}{75}$
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