In order to add or subtract two fractions you must first find a common denominator,

then add or subtract the two numerators together, while the common denominator will remain the same.

The easiest and fastest way for you to do this is to use a technique called 'Butterfly Math.'

Butterfly Math is a simple geometric model to assist you in memorizing how to add or subtract fractions.

Using this method typically guarantees that you will never forget how to add or subtract fractions ever again.

Looking at the examples above, observe that the butterfly method
works for any and all addition or subtraction problems.
The important thing is to practice working out problems by hand,
then you will pick up the pattern quickly and will never forget again.