\frac{3}{4}*8=\frac{3*8}{4}=\frac{3*2}{1}=6
1:\frac{4}{5}=1*\frac{5}{4}=\frac{5}{4}=1\frac{1}{4}
\frac{2}{3}*\frac{3}{4}=\frac{2*3}{3*4}=\frac{2}{4}=\frac{1}{2}=
\frac{5}{8}:1=\frac{5}{8}
1 \frac{1}{2}*\frac{4}{5}=\frac{3}{2}*\frac{4}{5}=\frac{3*4}{2*5}=\frac{3*2}{5}=\frac{6}{5}=1\frac{1}{5}
\frac{1}{2}:\frac{3}{4}=\frac{1}{2}*\frac{4}{3}=\frac{1}{1}*\frac{2}{3}=\frac{2}{3}
1\frac{ 1}{3}:1 \frac{1}{2}=\frac{ 4}{3}:\frac{3}{2}=\frac{ 4}{3}*\frac{2}{3}=\frac{8}{9}
\frac{9}{4}*\frac{5}{6}*1 \frac{3}{5}=\frac{9}{4}*\frac{5}{6}*\frac{8}{5}=\frac{9*5*8}{4*6*5}=\frac{3*2}{1*2}=\frac{6}{2}=3