Verified Answer :

\(\frac{5}{8} + \frac{2}{4}\)

Denominators should be of same numbers

\(\frac{5}{8} + \frac{3~multiply~by~2}{4~multiply~by~2}\)

\(\frac{5}{8} + \frac{6}{8}\)

\(\frac{11}{8}\)

\(1\frac{3}{8}\)

\(\frac{5}{8} + \frac{3}{4} =\) 


So,  
\(\frac{5}{8} + \frac{3}{4} * \frac{2}{2} = \frac{5}{8} + \frac{6}{8} = \frac{11}{8}\)

Simplified as mixed number equals to \(1 \frac{3}{8}\)

(Keep in mind that the LCM was 8.)