Basic College Mathematics (10th Edition)

$x=160$
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: $\frac{3x}{3}=\frac{480}{3}$ $x=160$