42
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84/14 = 6 84/7 = 12 84/3 = 28 Hence 84 is the least common denominator
The lowest common denominator is 6
The common denominator is 66.
20 and 14 are both integers. The common denominator of 20/1 and 14/1 is 1. The least common multiple is 140.
If 33 and 6 are denominators of fractions then the least common denominator is 66