Aschool cafeteria makes cheese sauce for macoroni using 15 cups of swiss cheese and 17 cups of cheddar cheese. perry tries to make the sauce for a family party using 5 cups of swill and 7 cups of cheddar is perry using the correct ratio?

Swiss Cheese : Cheddar Cheese
       15             :         17

     (÷ 3)                     (÷3)

       5               :         17/3 = 5 2/3

No, Perry is not using the correct ratio. If he is using 5 cups of Swiss Cheese, he should only use 5 2/3 cup of Cheddar Cheese.

You didn’t put the necessary image to solve the question : p