When we add or subtract two fractions, they must be the same type.
This means that they must have the same bottom number, which we call the denominator.
Both fractions have the same denominator. They are both 15ths.
We can simply add the top numbers to get 3 + 4 = 7.
|=||3 + 4|
Remember that the bottom number stays the same.
Are you happy with that?