Leo, Angie, and Scott are making frosting to decorate cookies. A recipe for one serving of frosting calls for 1 3/4 cups of sugar and 2 tablespoons of vanilla. They each brought the ingredients they had at home.

Leo brought 2 cups of sugar and 2/3 tablespoon of vanilla.
Angie brought 1 2/3 cups of sugar and 1 1/2 tablespoons of vanilla.
Scott brought 1 4/5 cups of sugar and 2 1/4 tablespoons of vanilla.
What is the maximum number of whole servings of frosting they can make with the ingredients they brought?