Bonjour,
A=[tex]\frac{385}{605} = \frac{77X5}{121X5} =\frac{77}{121} = \frac{7X11}{11X11}=\frac{7}{11}[/tex]
B=[tex]\frac{924}{144}=\frac{231X4}{36X4}=\frac{231}{36}= \frac{77X3}{12X3}=\frac{77}{12}[/tex]
C=[tex]\frac{258}{144} =\frac{43X6}{24X6}=\frac{43}{24}[/tex]
D=[tex]\frac{2170}{42} =\frac{1085X2}{21X2} =\frac{1085}{21}=\frac{155X7}{3X7}=\frac{155}{3}[/tex]
