Three friends decide to share a pizza equally. They cut the pizza into 8 equal slices. After they finish eating, they realize that one slice was left uneaten. What fraction of the pizza did each friend eat?
Each friend ate 7/24 of the pizza.

Here's the reasoning:

1. The friends cut the pizza into 8 equal slices, but they only ate 7 of those slices (since one was left uneaten).
2. To share these 7 slices equally among the three friends, we need to divide the 7 slices by 3.
3. In fraction form, this would be 7/3 slices per person.
4. However, since there were originally 8 slices in total, we need to express this as a fraction of the whole pizza.
5. So, each friend ate (7/3) * (1/8) = 7/24 of the pizza.