Answer
$x=160$
Work Step by Step
Set up a percent proportion. X is the unknown.
$\frac{part}{whole}=\frac{percent}{100}$
$\frac{48}{x}=\frac{30}{100}$
Find cross products
$3x=480$
Divide both sides by 3:
$\frac{3x}{3}=\frac{480}{3}$
$x=160$