Answer
$-\frac{73}{120}$
Work Step by Step
$\frac{7}{24} - \frac{9}{10}$
The LCD is 120
$\frac{7\times5}{24\times5} - \frac{9\times12}{10\times12}$ = $\frac{35}{120} - \frac{108}{120}$ = $\frac{-73}{120}$
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