3,4= 34/10= 17/5
0,12=3/25
0,72=72/100=18/25
2,55= 2 i 55/100= 255/100=51/20= 2 i 1/20
0,45=45/100=9/20
5,04= 5 i 4/100=504/100=126/25=5 i 1/25
