If 3½ cups of flour make 5 dozen cookies, then 3½ / 5 = 7/10 cups of flour will make 1 dozen cookies.
Therefore, 7/10 * 3 = 21/10 = 2 1/10 cups of flour will make 3 dozen cookies.
A chocolate chip recipe calls for 3 1/2 cups of flour to make 5 dozen cookies. How much flour is needed to make 3 dozen cookies?
2 answers
since the flour/cookies ratio is constant,
x/3 = (3 1/2)/5
x/3 = (3 1/2)/5