Question

Olivia bought 3 pizzas for her birthday party. At the birthday party, they ate 2 4/7 pizzas. What fraction of a pizza does she have left?

Answer 1

In order to determine the pizza left, subtract 2 4/7 to 3, as follow:

write 2 4/7 as a fraction:

`2(4)/(7)=2+(4)/(7)=(14+4)/(7)=(18)/(7)`

now, consider that 3 = 21/7. Then, you have:

`3-2(4)/(7)=(21)/(7)-(18)/(7)=(21-18)/(7)=(3)/(7)`

Hence, 3/7 of the pizza is left after they ate 2 4/7 pizzas.