Answer
$$\frac{15}{16}$$
Work Step by Step
Recall, one never divides by a fraction. Rather, if we want to divide by a fraction, we multiply by the reciprocal of the fraction. Recall, the reciprocal of a fraction is that fraction with the numerator and the denominator switched. Thus, we find:
$$ \frac{\left(-3+3x\right)}{16}\times \frac{5}{\left(x-1\right)}\\ \frac{15\left(-1+x\right)}{16\left(x-1\right)}\\ \frac{15}{16}$$