A recipe calls for 1 1/3 tablespoons of butter and serves 6 people.If you wish to cook this recipe for yourself, how much butter should you use? You would divide 1 1/3 by 6. (1 1/3) ÷ 6 = (4/3) ÷ (6/1) (4/3) × (1/6) 4/18 2/9 tablespoons Since there are no measuring spoons for ninths, we use the fact that 1 tablespoon = 3 teaspoons 2/9 tablespoon = (2/9) × (3 teaspoons) = (2/9)×(3/1) teaspoon = 6/9 teaspoon = 2/3 teaspoon There are no third teaspoon measuring spoons either so you have to measure a teaspoon and take a litle bit out. Edwin