$\"\"$

19.8 is being compared to 36.

So,19.8 is the part and 36 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 36.

$\"\"$

$\"\"$ (Cancel common terms)

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

19.8 is 55 $\"\"$ of 36.