SOLUTION: Kathleen is baking chocolate cupcakes. Each batch of 20 cupcakes requires {{{2/3}}} cups of cocoa. a. If Kathleen has {{{3&1/4}}} cups of cocoa, how many full batche

We determine how many handfuls of  are contained in
 by dividing  by .



We invert the second and multiply:



We change the first to an improper fraction:



Multiply numerators and denominators:



We change that to a mixed number:

    4
 8)39
   32
    7

That's 

So she can make 4 full batches.

If she makes 4 batches, it will take  cups.

Left over, she will have 

Change both to improper fractions:



Get a least common denominator of 12

 of a cup left.

Edwin