Answer:
$13.05
Explanation:
Given: Mark and his 3 friends = 4 Total cost = $52, percent off: 20%
To find: How much each person would pay if they split the bill evenly.
Solution:
Firstly, since they left the server a 20% tip, multiply 20% by the total cost. Convert it to a fraction. Note: you're adding 20% to the total cost.
+
=
Now, that is done, let's divide the newly found cost by the four friends.
=
So, they would pay $13.05 evenly.