Question 11496
So we know that she ordered 2 pizzas which are cut into 8 pieces on each one, so we get 16 pieces of pizzas.

Since Chris got 1/2 of "a" pizza, he got 1/2 times 8 which equals to 4 pizzas

Since John got 3/8 of "a" pizza, he got 3/8 times 8 which equals to 3 pizzas

Since Sally got 1/4 of "a" pizza, she got 1/4 times 8 which equals to 2 pizzas

Since 9 pizzas were taken away, Micelle got 16 - 9 pizzas which is 7 pizzas