Mario is making dinner for nine people mario buy 6 containers of soup each container is 18 ounces if everyone gets the same amount of soup how much do for each person get

We first need to find out the total amount of ounces  of soup he has.

 1 container  = 18 ounces

6 containers   = x

Where x is the total amount of ounces in 6 containers. 

Cross multiplying  the above equation we get:

1 * x = 6 * 18

x = 108

Total amount of soup he has is 108 ounces.

We now simply divide this by the number of people,  so:

108 / 9 = 12

So each person will get 12 ounces of soup.