Answer:
A commission rate of 31%.
Step-by-step explanation:
Let C represent commission rate he earned.
The equation therefore becomes 26,610 + C*79,200= 51,162
Then solve for C by first subtracting 26,610 from both sides;
79,200C = 51,162 - 26,610
79,200C= 24,552
Next, divide both sides by 79,200 to get;
C=24,552 / 79,200
C= 0.31 or 31%
Therefore, Demetrius earned a commission rate of 31%.