12+12\dfrac{1}{2} + \dfrac{1}{2}
12+12\dfrac{1}{2} + \dfrac{1}{2}
Since these fractions have the same denominator, we can just add the numerators
12+12=22\dfrac{1}{2} + \dfrac{1}{2} = \dfrac{2}{2}
22\dfrac{2}{2} can be reduced, since 22 is a factor of both 22 and 22:
22÷22=1\dfrac{2}{2} \div \dfrac{2}{2} = 1
The fraction is now in lowest terms