math
posted by Sarah on .
A recipe that makes 18 cookies calls for 3/4 cup of sugar. How much sugar is needed to make 24 cookies using this recipe?

One way to solve it is to first change 3/4 to 0.75
Set up a proportion, cross multiply, and solve for x.
18/0.75 = 24/x
18x = 18
x = 1 cup