Ratios and Proportions

A recipe for shortbread cookies calls for 1/2 cup of butter, 2 cups of flour, 1/2 teaspoon of salt and 1 teaspoon of vanilla. This makes 12 cookies. Convert this recipe to one that would make 100 cookies.

(A): 5 cups butter, 20 cups flour, 5 teaspoons salt, 1 teaspoons vanilla
(B): 4.17 cups butter, 16.67 cups flour, 4.17 teaspoons salt, 8.33 teaspoons vanilla
(C): 240 cups butter, 600 cups flour, 240 teaspoons salt, 480 teaspoons vanilla
(D): 16.67 cups butter, 66.68 cups flour, 16.67 teaspoons salt, 33.34 teaspoons vanilla

Solution: B

Have trouble with this one? Make a note to try problem 1 again and rework Ratio and Proportion.

Next Try It Out Problem.

Developed by

The Shodor Education Foundation, Inc.
in cooperation with the Department of Chemistry,
The University of North Carolina at Chapel Hill