A grocer store sold 6 cans of cream of mushroom and 6 other cans.
6:6 is the ratio, or for every one can of cream of mushroom sold, one other can of soup is sold.
With this in mind, if the store sells 10 cans of soup (because the ratio is 1:1), the store should have sold 10 cans of cream of mushroom soup.
hope this helps