12 is an integer , not a fraction - and certainly not a fractoin!
You could write it as 12/1 but there would be little point in doing so.
None, because there is no such thing as a fractoin.
9/4
5/4
6/10 or 60/100
7/25
None, because there is no such thing as a fractoin.
It is: 1/3 times 1/4 = 1/12
9/4
5/4
3/5.
0.75 = 3/4
0.3 = 3/10
6/10 or 60/100
2/10=1/5
It is: 11/25 in its lowest terms
7/25
65/1000 or 13/200