a.
2/3 = 8/12 ( amplificat cu 4 )
3/4 = 9/12 ( amplificat cu 3 )
2/3 < 3/4
b.
3/8 = 15/40 ( amplificat cu 5 )
2/10 = 8/40 ( amplificat cu 4 )
3/8 > 2/10
c.
23/24 = 69/72 ( amplificat cu 3 )
17/18 = 68/72 ( amplificat cu 4 )
23/24 > 17/18
d.
59/60 = 236/240 ( amplificat cu 4 )
79/80 = 237/240 ( amplificat cu 3 )
59/60 < 79/80