Bonjour !
1)
-2/3 = (-2*10)/(3*10) = -20/30
1/6 = (1*5)/(6*5) = 5/30
4/5 = (4*6)/(5*6) = 24/30
2)
-3/24 = (-3*2)/(24*2) = -6/48
3/4 = (3*12)/(4*12) = 36/48
-3/8 = (-3*6)/(8*6) = -18/48
3)
-32/12 = (-32*24)/(12*24) = -768/288
-24/18 = (-24*16)/(18*16) = -384/288
4/32 = (4*9)/(32*9) = 36/288
4)
-1/24
1/8 = 3/24
-1/3 = -8/24
1/2 = 12/24
Bon courage !
