Réponse :
a. 1,57/0,1 = 1,57*100/0,1*100=157/10
b. 17/0,3 = 17*10/0,3*10 = 170/3
c. 6/2,5 = 6*10/2,5*10 = 60/25 = 5*12/5*5 = 12/5
d. 34,47/1,1 = 34,47*100/1,1*100 = 3447/110
e. 5,9/10,1 = 5,9*10/10,1*10 = 59/101
f. 1/0,75 = 1*100/0.75*100 = 100/75 = 25*4/25*3 = 4/3
