Final answer:
To find the free-throw average, divide the number of successful free throws by the total number of attempts.
Step-by-step explanation:
To find the free-throw average expressed as a decimal, divide the number of successful free throws by the total number of attempts. In this case, Trent made 11 free throws out of 15 attempts. So, the decimal free-throw average is 11/15 which is approximately 0.7333.