<PRE><B>Question 135878</B>
Let x=amount of flour needed for 5 doz cookies
2 1/2 cups of flour is to 3 doz cookies as x cups of flour is to 5 doz cookies and this is written as follows
(2 1/2)/3=x/5  cross multiply ( or multiply each side by 15)


5*(2 1/2)=3x or
12 1/2=3x  and this equals
25/2=3x  divide both sides by 3

x=25/6=4 1/6 cups--- amount of flour needed for 5 doz cookies

or we could look at it this way:

2 1/2 cups--------------- 3 doz
5 cups------------------------6 doz

5/6 cups---------------------1 doz
5*(5/6)------------------------5 doz or
4 1/6 cups----------------------5 doz


Hope this helps---ptaylor</PRE>