Answer
$-\frac{1}{3}$
Work Step by Step
The given expression is
$=\frac{a}{4b}$
Substitute $4$ for $a$ and $-3$ for $b$.
$=\frac{4}{4(-3)}$
Cancel common term.
$=\frac{1}{-3}$
$=-\frac{1}{3}$
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