Réponse :
30
[tex]\frac{30}{24} =\frac{15}{12} =\frac{5}{4}[/tex]
[tex]\frac{16}{20} =\frac{8}{10} =\frac{4}{5}[/tex]
[tex]\frac{5}{4} *\frac{4}{5} =\frac{5*4}{4*5} =\frac{20}{20} =\frac{1}{1} =1[/tex]
