Final answer:
To determine the value of the expression 15.91 subtract 8.32, subtract the second number from the first to get 7.59.
Step-by-step explanation:
To determine the value of the expression 15.91 subtract 8.32, we simply subtract the second number from the first:
15.91 - 8.32 = 7.59
Therefore, the value of the expression is 7.59.