Bonjour,
21/126
21 => 7*3
126/2= 63
63/3= 21
21/3 =7
=> 2*3*3*7
en commun: 3*7 = 21
21/21 =1
126/21 =6
21/126 = 1/6
84/360
84/2 =42
42/2 =21
21/3 =7
=> 2*2*3*7
360/2 = 180
180/2 =90
90/2 =45
45/3 =15
15/3 = 5
=> 2*2*2*3*3*5
en commun:
2*2*3 12
84/12 =7
360/12 =30
84/360 = 7/30
4459/98
98/2 =49
49/7=7
=> 2*7*7
4459/7 = 637
3637/7 =91
=> 7*7*91
en commun: 7*7 = 49
98/49 = 2
4459/49 = 91
4459/98 = 91/2