Bonjour.
1. 15 = 1 x 15 et 60 = 4 x 15 donc tu as (1 x 15)/(4 x 15) = 1/4
2. 13 = 1 x 13 et 26 = 2 x 13 donc tu as (1 x 13)/(2 x 13) = 1/2
3. 51 = 3 x 17 et 68 = 4 x 17 donc tu as (3 x 17)/(4 x 17) = 3/4
4. 252 = 4 x 63 et 189 = 3 x 63 donc tu as (4 x 63)/(3 x 63) = 4/3
5. 256 = 2 x 128 et 384 = 3 x 128 donc tu as (2 x 128)/(3 x 128) = 2/3
Passe une bonne journée :)
