The simple answer is 4 people. 27/6.75 is an even 4 people. Reasoning behind it- However many people went out split the bill evenly, the bill totaled out to 27 dollars. The problem stated that it was split evenly meaning that if each person spent 6.75 the equation would be 27/6.75. I put that into the calculator and got 4 people. Therefore 4 people went out for lunch.