5 /3 : 4 : 3 /7 = 5 /12 : 3 /7= 35 /36
\(\frac{5}{3}\div4\div\frac{3}{7}=\frac{5}{3}\times\frac{1}{4}\times\frac{7}{3}=\frac{5\times1\times7}{3\times4\times3}=\frac{35}{36}\)
\(\frac{5}{3}:4:\frac{3}{7}=\frac{5}{3}.\frac{1}{4}.\frac{7}{3}=\frac{7.5}{3.3.4}=\frac{35}{36}\)