Bonjour
a. 12/9 = (3 x 4) / (3 x 3) = 4/3
b. 19/8 - 15/8 = 4/8 = (4 x 1) / (4 x 2) = 1/2
c. 15/15 + 13/15 = 28/12 = (4 x 7) / (4 x 3) = 7/3
d. 16/11
e. 18/18 = 1
f. 26/13 = (13 x 1) / (13 x 2) = 1/2.
