3[tex]\frac{5}{8}[/tex] + 1[tex]\frac{3}{4}[/tex] = [tex]\frac{3*8 + 5}{8}[/tex] + [tex]\frac{4+3}{4}[/tex] = [tex]\frac{29}{8}[/tex] + [tex]\frac{7}{4}[/tex] = [tex]\frac{29+14}{8}[/tex] (We take 8, which is the LCM of 4 and 8, as the common denominator) = [tex]\frac{43}{8}[/tex]
