14 over 16 is a fraction, not two separate numbers. Therefore, a single number, and especially a fraction, cannot have any common factors.
The GCF is 1.
The GCF is 2.
The GCF is 2.
The GCF is: 2
The GCF is 2.
The GCF is 1.
The GCF is 2.
The GCF is 2.
2
The GCF of 6 and 16 is 2.
There is no highest common multiple of 14 and 16. Whatever common multiple you come up with as the highest I can always add the lowest common multiple of 14 and 16 (122) to it and get a higher common multiple of 14 and 16.
2