Question
Express $\frac{-3}{5}$ as a rational number with denominator. $-40$

Answer

$-40 = 5 \times (-8)$
$\therefore\frac{-3}{5}=\frac{-3\times(-8)}{5\times(-8)}$
$[$Multiplying the numerator and denominator by $(-8)]$
$=\frac{24}{-40}$

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