Answer
$\frac{25}{28}$
Work Step by Step
$\frac{3y}{4}+\frac{y}{7} $
The LCD is 28
$\frac{3y}{4}\times\frac{7}{7}+\frac{y}{7}\times\frac{4}{4}$
$\frac{21y}{28}+\frac{4y}{28}$
$\frac{21+4}{28}$
$\frac{25}{28}$
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