HELP :( PLEASE ME AND MY FRIEND ARE SO UNSMART NGLLLL

Hello There! :)
I can help !
[tex]\frac{20}{1} :\frac{5}{3} =\frac{20}{1} *\frac{3}{5} =\frac{60}{5} =12[/tex] [tex]Mental[/tex] [tex]Math[/tex]
[tex]\frac{7}{2} :\frac{4}{5} =\frac{7}{2} *\frac{5}{4} =\frac{35}{8}[/tex] [tex]Math[/tex] [tex]Muscle[/tex]
[tex]\frac{4}{1} :\frac{4}{3} =\frac{4}{1} *\frac{3}{4} =\frac{12}{4} =3[/tex]
[tex]\frac{8}{5}:\frac{3}{2} =\frac{8}{5} *\frac{2}{3} =\frac{16}{15}[/tex]
[tex]\frac{13}{15} :\frac{15}{7} =\frac{13}{15} *\frac{7}{15} = \frac{91}{225}[/tex]
[tex]\frac{11}{2} :\frac{3}{4} =\frac{11}{2}*\frac{4}{3} =\frac{44}{6} =\frac{22}{3}[/tex]
Hope it helps!