Answer
true
Work Step by Step
To determine whether $\frac{28}{17}=\frac{9\frac{1}{3}}{5\frac{2}{3}}$ is true, determine whether the cross products are equal.
$28\times5\frac{2}{3} = 17\times9\frac{1}{3}$
$\frac{28}{1}\times\frac{17}{3} = \frac{17}{1}\times\frac{28}{3}$
$\frac{476}{3} = \frac{476}{3}$
The cross products are equal so the proportion is true.
