Final answer:
To find out how much milk John used to make two recipes, multiply 1 2/3 by 2.
Step-by-step explanation:
To find out how much milk John used to make two recipes, we need to multiply the amount of milk used in one recipe by the number of recipes.
John used 1 2/3 cups of milk in one recipe. To find out how much milk he used in two recipes, we multiply 1 2/3 by 2.
1 2/3 x 2 = 3 1/3
Therefore, John used 3 1/3 cups of milk in total to make the two recipes.