Answer
Percent of Total is 5%.
Work Step by Step
Use ratios and cross multiplication to find the percent of total.
$\frac{part}{whole}=\frac{percent}{100}$
A whole circle is $360^\circ$.
$\frac{18}{360}=\frac{x}{100}\longrightarrow$ Cross multiply.
$360x=(18)(100)\longrightarrow$ Simplify.
$360x=1800\longrightarrow$ Divide both sides by 360 to solve for x.
$360x\div360=1800\div360\longrightarrow$ Simplify.
$x=5$
