Answer
$-\frac{3}{10}$
Work Step by Step
Substitute the given values and simplify.
$\frac{x}{y}=\frac{\frac{2}{7}}{-\frac{20}{21}}$ multiply by the reciprocal
$=\frac{2}{7}\times-\frac{21}{20}$ cancel common factors
$\frac{/\!\!2}{/\!\!7}\times-\frac{/\!\!7\times3}{/\!\!2\times10}$
$=-\frac{3}{10}$
