Bonjour
calculer en fractions irreductibles 42/12, -210/45, 252/396, 130/-165 144/72
42/12 = (6 x 7)/(6 x 2) = 7/2
-210/45 = (-15 x 14)/(15 x 3) = (-14/3)
252/396 = (4 x 9 x 7)/(4 x 9 x 11) = 7/11
130/-165 = (5 x 2 x 13)/(-5 x 3 x 11) = -26/33
144/72 = (8 x 2 x 9)/(8 x 9) = 2