Maria, Kara, and Tommy order 1 pizza to share. Maria eats 1/4 of the pizza, Kara eats 1/8 of the pizza, and Tommy eats 3/8 of the pizza. How much of the pizza is left?
So you give them all a common denominator of 8. This means Maria eats 2/8 of the pizza, Kara eats 1/8 of the pizza, and Tommy eats 3/8 of the pizza. When you add them you get 6/8 which simplified to 3/4.
