Answer
Monthly earnings are 3200. Yearly earnings are 38,400.
Work Step by Step
The percent is 7.5%. The part is 240. The whole is unknown.
$\frac{240}{x} = \frac{7.5}{100}$
$7.5x = 240\times100$
$\frac{7.5x}{7.5} = \frac{24000}{7.5}$
$x = 3200$
$3200\times12 = 38,400.
