We know that Missy uses 1/3 of her flour in the recipe and that she has 2 pounds total of flour. To find out how much flour she used, we need to multiply 1/3 * 2. We do this because we are trying to find 1/3 of 2 pounds, and the word of refers to multiplication in math.
1/3 * 2 = 1/3 * 2/1 = 2/3
Therefore, Missy used 2/3 pounds of flour in her recipe.
Hope this helps!