$\"\"$

52.2 is being compared to 145.

So,52.2 is the part and 145 is the whole.

Let n represent the percent.

The percent proportion is $\"\"$ .

Apply cross product property of equality: $\"\"$ then $\"\"$ .

$\"\"$

$\"\"$ (Multiply: $\"\"$ ) $\"\"$

Apply division property of equality: Divide each side by 145.

$\"\"$

$\"\"$ (Cancel common terms)

$\"\"$ (Divide: $\"\"$ ) $\"\"$

52.2 is 36 $\"\"$ of 145.