Answer:
$20.25
Explanation:
There's two ways to solve this.
First Method: Because they were a group of 27, they were meant to pay $8.50 each.
Multiplying the cost for each person by the number of people (8.50 x 27), we learn that the group would only have to pay $229.50.
However, they paid $9.25 each, and with 27 people, (9.25 x 27) would be $249.75 in total.
Now, we subtract how much the group paid in total by the amount they were meant to pay.
$249.75 - $229.50 = $20.25
Second Method:
Since each person was meant to pay $8.50 but paid $9.25, subtracting $9.25 - $8.50 makes us find out that each person paid $0.75 more than needed.
Since there's 27 people who each paid $0.75 more than needed, we can simply multiply $0.75 x 27 and also get $20.25.
And there's your final answer. Ps: sorry for answering 4 years late