after a birthday party that began with 3 pizzas, there was 1/8 of one of them left, 3/4 of another and 3/8 of the last one. How much pizza was eaten?

3/4 = 6/8

(24/8) - (1/8) - (6/8) - (3/8) = ?

7/8 ??

How did you get that answer?

nevermain is it 7/4

Yes. What is that in terms of a whole pizza and a fraction of a pizza?

the whole pizza

Yes, it's one whole pizza plus a fraction of another. What fraction of another is there?