Ayuda plissss no entiendo es para hoy no mañana

[tex]\frac{2}{5}[/tex] ÷ 4 = [tex]\frac{2}{5}[/tex] ÷ [tex]\frac{4}{1}[/tex] = [tex]\frac{2}{20} =\frac{1}{10}[/tex]
[tex]\frac{6}{7}[/tex] ÷ 3 = [tex]\frac{6}{7}[/tex] ÷ [tex]\frac{3}{1}[/tex] = [tex]\frac{6}{21}=\frac{2}{7}[/tex]
[tex]\frac{1}{8}[/tex] ÷ 9 = [tex]\frac{1}{8}[/tex] ÷ [tex]\frac{9}{1}[/tex] = [tex]\frac{1}{72}[/tex]
[tex]\frac{5}{6}[/tex] ÷ 5 = [tex]\frac{5}{6}[/tex] ÷ [tex]\frac{5}{1}[/tex] = [tex]\frac{5}{30} =\frac{1}{6}[/tex]