A salesperson at a furniture store earns a 3% commission on all sales. How much commission does the salesperson earn on a $1400 sale?
A) $21
B) $42
C) $420
D) $1,420

Question

A salesperson at a furniture store earns a 3% commission on all sales. How much commission does the salesperson earn on a $1400 sale?
A)	$21	
B)	$42	
C)	$420	
D)	$1,420

greatlife44 · Answer

you can set up a proportion like this 

$$\frac{ commission  }{ total } = \frac{ percent}{ 100 }$$

$$\frac{ x }{ 1400 } = \frac{ 3 }{ 100 }$$

then you would cross multiply