Finally, something useful from the Internet. A simple equation to tell you how many pizzas to order for a group. The assumptions are that each person will eat three pieces of pizza and that each pizza is cut into eight slices. That means X *3/8 = P, with X representing the number of consumers and Pis the number of pizzas to order.

The problem I have with it is that I typically eat four pieces. Click this link to read more.

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