You can
put this solution on YOUR website!
can be thought of as

. we can then cancel the 8's leaving

--> 1/2.
This is the "full" method. In reality, all you need to do is look at the 2 numbers and see what goes into both and divide by that number.
As for

. Again, what is common to both the numerator and denominator? Answer is x, so we can cancel them, leaving us with just 2y.
jon.