Bonjour
1)
8/12 = (4 x 2) / (4 x 3) = 2/3
10/6 = (2 x 5) / (2 x 3) = 5/3
66/30 = (6 x 11) / (6 x 5) = 11/5
12/51 = (3 x 4) / (3 x 17) = 4/17
2)
72/42 = (6 x 12) / (6 x 7) = 12/7
140/340 = (20 x 7) / (20 x 17) = 7/17
7 140/2 310 = (210 x 34) / (210 x 11) = 34/11
4 440/8 140 = (740 x 6) / (740 x 11) = 6/11.
