42
The least common denominator (LCD) refers to a multiple that is COMMON to two or more numbers. You have only one number in the question! The least denominator for a number is itself.
It is: 77
56
The least common denominator of 2 and 6 is 6
42
84
84
It is: 42
The least common denominator of 6,7, and 8 is the least common multiple of those numbers. This is 168.
1008
420
It is 630
126
42
84
84/14 = 6 84/7 = 12 84/3 = 28 Hence 84 is the least common denominator