To make two-thirds of the recipe, we need to multiply each ingredient by 2/3.
2 2/3 cups of chicken broth * 2/3 = 1 3/4 cups of chicken broth
1 1/2 cups of chicken * 2/3 = 1 cup of chicken
3/4 cup of rice * 2/3 = 1/2 cup of rice
So Mrs. Hughes needs 1 3/4 cups of chicken broth, 1 cup of chicken, and 1/2 cup of rice to make two-thirds of the chicken and rice recipe.