7/12-1/8=14/24-3/24=11/24 12=3x2x2 = 3x2 la puterea 2 8= 2x2x2 =2 la puterea 3 2x2x2x3=24 (factorii comuni si necomuni la puterea cea mai mare) =2 la puterea3 x3=24 11/15-7/20=44/60-21/60=23/60 15=3x5 20=2x2x5 2x2x3x5=60 17/3-15/3=2/3 243/945-126/945=117/945
