7 2/5 = 37/5.
25/7 is an improper fraction.
7/25 is a proper fraction and there is no sensible way to write it as an improper fraction.
97/25 = 232/25
31/7
25/9
That would be 25/9.
As an improper fraction 25 thirds is 25/3.
3 and 4/7 = 25/7
7/4 is an improper fraction.
It is: 186/25 as a simplified improper fraction
2 7/9 = 25/9.
4.64 as an improper fraction is 116/25