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.
Answer: 55
715
165
440