Final answer:
To find the commission earned by the employee as a percentage of the total cost of the gym membership, divide the commission amount by the total cost. In this case, the commission percentage is 16%.
Step-by-step explanation:
To find the commission earned by the employee as a percentage of the total cost of the gym membership, we need to determine the commission amount earned by the employee and divide it by the total cost of the gym membership.
The total cost of the gym membership is $50 ($42 for the gym and $8 for the employee).
The commission earned by the employee is $8. Therefore, the commission as a percentage of the total cost is:
Commission percentage = (Commission amount / Total cost) x 100
= (8 / 50) x 100
= 16%