I'm trying to simplify this complex fraction:

but I don't know what to do with the ones in front of the fractions. This is as far as I have gotten. The common denominator is so I need to multiply them by , but how?

These are mixed numbers right? To multiply a mixed number by a fraction, you need to change the mixed number to an improper fraction, but how do I do it when I don't know how much x and y are worth?