It is already reduced.
14 over 26 reduced to its lowest term is 7/13
No, it is already reduced.
6 over 8 reduced = 3/4
6 over 18 is reduced to 1/3
6/25 cannot be reduced.
13/18
26/21
Yes by two
2/3
6/18 can be reduced to 1/3
6/68 can be reduced to 3/34