8 -

First, make the denominators the same. / Your problem should look like: 8 ×

-

.
Second, simplify. Denominators are now the same. / Your problem should look like:

-

.
Third, join the denominators. / Your problem should look like:

.
Fourth, simplify. / Your problem should look like:

.
Fifth, convert to mixed fraction. / Your problem should look like:

which is your answer.