Given :
[tex]\frac{3}{4}+\frac{3}{8}=\text{?}[/tex]The minimum multiple of 4 and 8 = 8
So,
[tex]\begin{gathered} \frac{3}{4}=\frac{2\cdot3}{2\cdot4}=\frac{6}{8} \\ \\ \frac{3}{8}=\frac{3}{8} \\ \\ \frac{3}{4}+\frac{3}{8}=\frac{6}{8}+\frac{3}{8}=\frac{6+3}{8}=\frac{9}{8} \end{gathered}[/tex]So, the answer is : 9/8 units
We can convert it to a mixed number , the answer wil be = 1 1/8 units