This cannot be answered properly because at least two numbers are required.
The least common denominator for 12 and 16 is 48.
A common denominator, though the least, is 48.
336
48
528
48
1200
48
There is none because the Least Common Denominator (or LCD) is the Least Common Multiple (LCM) of the denominators of two or more fractions.
48
48
144