Answer
$\frac{30}{18}$
Multiply each side by $\frac{t}{18}$
Work Step by Step
You are given $\frac{30}{t}$=$\frac{18}{r}$
Multiply each side by $\frac{t}{18}$
$\frac{30}{t}$ x $\frac{t}{18}$ = $\frac{18}{r}$ x $\frac{t}{18}$
$\frac{30}{18}$=$\frac{t}{r}$