4 and 1/4 is because you have a guaranteed 4 wholes but with 3 and 2/3 you only have a gruantee of 3 wholes.
84
28
28 is the LCM of 4 and 14
It is 8/14 = 4/7
The least common multiple of 4 , 14 = 28
1,3,5,15 1,23
It is: 506
The GCF is: 1
2
It is: 42
It is: 14
168