bonjour
A = 299 : 84 = 3.56
B ) 3.7 h = 3 h + 0.6 * 7 = 3 h 42 min
( 53/51 - 32/85 ) / 63/24
= (265/255 - 96/255 ) : 63/24
= 169/255 x 24/63
= 4056/16065
= 0.252