Question

Earl gets a commission of 20% on all sales. He sold $1,580.00 worth of goods. What was the amount of his paycheck?

Answer 1

The answwer

20%  of $1,580.00 is   X= 1,580 x20/ 100 = $316
 
the amount of his paycheck was $316

Answer 2

For this case we can make the following rule of three:

100% -----------------> $ 1,580.00

20% -------------------> x

From here, we clear the value of x.

We have then:

$x = \frac {20} {100} 1580\\x = 316$

From here, you get the amount that Earl earns in commissions.

Answer:

the amount of his paycheck is $ 316