Krystal works at the local jewelry store. She earns a weekly salary of $275 plus a commission of 2.7% on all sales. Her sales for the week total $1,790. How much does Krystal earn this week?

1 Answer
smendyka
Jul 18, 2017

See a solution process below:

Explanation:

We can write the equation to determine Krystal's weekly earnings as:

#e = p + (r * s)#

Where:

#e# is the total weekly earnings, what we are solving for in this problem.

#p# is Krystal's weekly base pay or salary: $275 for this problem.

#r# is Krystal's commission rate. #2.7%# for this problem. "Percent" or "%" means "out of 100" or "per 100", Therefore #2.7%# can be written as #2.7/100#.

#s# is Krystal's sales for the week. $1790 for this problem.

Substituting and solving for #e# gives:

#e = $275 + (2.7/100 * #1790)#

#e = $275 + ($4833)/100#

#e = $275 + $48.33#

#e = $323.33#

Krystal's gross earnings for the week were: $323.33

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