Bonsoir
D=44sur105 X 42sur66
D = 44/105 x 42/66 = 22/105 x 42/33 = 924/3465 = 4/15
G= 40sur48 + 105sur27x 90sur56
G = 40/48 +105/27 x 90/56 = 40/48 + 105/3 x 10/56
= 40/48 + 1050/168
= 40/48 + 25/4 = 40/48 + 300/48 = 340/48 = 85/12
c=3sur12 - 5sur18+12
C = 3/12 +5/18 +12 = 9/36 +10/36 + 432/36 = 451/36
e= - 5sur2 divisé par 4sur15
E = -5/2 : 4/15 = -5/2 x 15/4 = -30/8 = -15/4
H = (-12sur14+20sur15) x 98 sur 25
H = (-12/14 +20/15) x 98/25
= (-180/210 + 280/210) x 98/25
= 100/210 x 25/98 = 10/21 x 25/98 = 250/2058 = 125/1029
