Answer:
[tex]\frac{1}{12}[/tex] or 0.08333...
Step-by-step explanation:
To divide by a fraction, multiply the first fraction by the opposite of the second fraction, or the reciprocal.
[tex]\frac{-2}{7} / \frac{-8}{21} = \frac{-2}{7} * \frac{21}{-8} = \frac{1}{3} * \frac{1}{4} = \frac{1}{12}[/tex]
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