3 is not a fraction.
It is 3/1 as an improper fraction
3.6/3 - not conventionally describes as a fraction.
It is 313/1000 as a fraction
.666 to a fraction equals approximately 2/3.
3/25
3/4
3/10
3/250
3/2
It is 3/1 as an improper fraction
4 to a fraction = 4/1