Question

A recipe that makes 4 servings calls for 2/3 cup of flour. Isadora uses a large container of flour to make 20 servings of the recipe. What number represents the change in the amount of flour from the large container?

Answer 1

The concept that is applicable in this item is that of proportionality. The ratio of the first set of values should be proportional to that of the second set. We represent the unknown value of the flour for 20 servings as x and generate the equation,

                                             4/(2/3) = 20/x

The value of x from the equation is 3 1/3. 

Answer 2

Answer is -3 1/3 hope this helps : )