Question
Express $\frac{5}{7}$ as a rational number with numerator:
$-28$
$-28$
✓
Answer
$\frac{5}{7}$ as a rational number with denominator:
$-28$ is:
$\frac{5\times-4}{7\times-4}=\frac{-20}{-28}$
(Multiplying numerator and denominator by $-4$)
$-28$ is:
$\frac{5\times-4}{7\times-4}=\frac{-20}{-28}$
(Multiplying numerator and denominator by $-4$)
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