[tex]\displaystyle\bf\\\frac{7}{16} +\frac{13}{6} :\frac{8}{13} =\frac{7}{16} +\frac{13}{6} \cdot\frac{13}{8} =\frac{7}{16} +\frac{169}{48} =\frac{7\cdot 3+169}{48} =\\\\\\=\frac{21+169}{48} =\frac{190}{48} =3\frac{46}{48} =3\frac{23}{24}[/tex]