Here, the first step would be to convert all the measurements into a single unit.
Since inches is the smallest units, we convert all the measurements to inches
The conversion is 1 yard =36 inches
Width = 6 yards 24 inches
Width (in inches) = 6*36 + 24 = 240 inches
Length = 5 yards
Length (in inches) 5*36 = 180 inches
Ratio of the width to the length = 240/180 =4/3
Ratio of the width : length = 4 : 3