Answer:
The commission rate is 9%
Step-by-step explanation:
We are given;
We are required to determine the commission rate;
We need to know that;
Total earnings = Monthly salary + Commission
Therefore;
Commission = Total earnings - monthly salary
= $1182.60 - $315
= $867.6
Therefore, assuming the commission rat is x %
Then;
x/100 × $9640 = $867.6
x/100 = $867.6 ÷ $9640
x/100 = 0.09
x = 9%
Therefore, the commission rate is 9%