Bonjour,
2/9:4/27+5/2
= 2/9*27/4 +5/2
= 54/36 +5/2
= 9/6+5/2
= 9/6+15/6
= 24/6
= 4
si c'est - 2/9
= -2/9*27/4 +5/2
= -27/18+5/2
= -9/6+5/2
= -24/6
= -4
