There is none because the Least Common Denominator (or LCD) is the Least Common Multiple (LCM) of the denominators of two or more fractions.
least common denominator of 26 42 and 28 is 1092.
least common denominator of 36 42 and 28 is 252.
The least common denominator is 1. The greatest common denominator is 2. The least common multiple is 1,218.
42
42
The Least Common Multiple (LCM) for 28 42 is 84.
126
42
84
332
210
210