Bonsoir
Rendre irréductible la fraction suivante 1260/1638
1260/2 = 630
630/2 = 315
315/3 = 105
105/3 = 35
35/5 = 7
7/7 = 1
1638/2 = 819
819/3 = 273
273/3 = 91
91/7 = 13
13/13 = 1
1260/1638 = (2^2 x 3^2 x 5 x 7)/(2 x 3^2 x 7 x 13)
1260/1638 = (126 x 10)/(126 x 13)
1260/1638 = 10/13
