Question

what is 20% of 50?
$\frac{20}{100}=\frac{x}{50}$
$x =?$

Explanation:

Step1: Cross - multiply the proportion

$20\times50 = 100\times x$

Step2: Solve for $x$

$x=\frac{20\times50}{100}$
$x = 10$

Answer:

10