Homework Help: math

Posted by Sarah on Thursday, March 3, 2011 at 10:14pm.

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?

math - Ms. Sue, Thursday, March 3, 2011 at 10:16pm
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

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