It is: 42
84
84
84/14 = 6 84/7 = 12 84/3 = 28 Hence 84 is the least common denominator
7 x 6 x 5 = 210
42
84
126
It is: 42
84
The least common denominator of 6,7, and 8 is the least common multiple of those numbers. This is 168.
1008
42
420
It is 630
126
84