880
A common denominator, though not the least, is 80.
A common denominator is 55.
55
A common denominator, though not the least one, is 66*55 = 3630.
The common factors of 55 and 80 are 1 and 5
80
A common denominator, though not the least, is 80.
The Least Common Multiple (LCM) for 55 80 is 880.
The common denominator of any two or more whole numbers will always be 1.
Answer: 55
715
165