The easiest way is to first convert these "mixed fractions" (that's where
you have a whole number and a fraction) to "improper fractions" (that's where
there is no whole number, but the numerator of the fraction is larger than the
denominator). Let me give an example:
Start by converting each mixed fraction to an improper fraction:
So we know now that
The next step is to add these improper fractions. But to do that, we must
first find a common denominator. I'll "cross-multiply" (that is, I'll multiply
each fraction's top and bottom by the bottom of the other fraction):
The last step is to convert our improper fraction back to a mixed fraction:
I hope this example helps you in your own questions!
Stephen La Rocque.