Bonsoir,
convertir:
1 h= 60 mn
1 mn = 60 s
1.203125 h= 1 h +0.203125= 1+0.203125x60= 1 +12.1875
0.1875x60≈ 11 s
donc 1.203125 h= 1h 12 mn 11 s
en minutes et secondes: 60mn+12 mn11 s= 72 mn 11 s
