Bonjour,
5/4 -2/3 *9/16
priorité à la multiplication
5/4 - 18/48
= 5/4 -9/24
= 30/24 -9/24
= 21/24 = 7/8
7/3 -2/3 +8/7
= 5/3 +8/7
= 35/21 + 24/21 = 59/21
