Answer
$-\frac{4}{7}$
Work Step by Step
$-\frac{2}{5}\div\frac{7}{10}$
=$-(\frac{2}{5}\div\frac{7}{10})$
=$-(\frac{2}{5}\times\frac{10}{7})$
=$-(\frac{20}{35})$
=$-\frac{4}{7}$
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