2
The lowest common denominator of 30 and 42 is 210.
It is 42
The greatest common denominator is infinite.
The lowest common denominator of 5/42 and 7/30 is 210.
The lowest common FACTOR of 7,3 and 2 is 42.
42
42
42
The LCM is 42.
42
The easiest way is through prime factorization. Example: 1/30 and 1/42 The lowest common denominator in this case is the LCM of 30 and 42. 2 x 3 x 5 = 30 2 x 3 x 7 = 42 2 x 3 x 5 x 7 = 210, the LCM and the lowest common denominator.
2. 14, 4 and 42 are all divisble by 2.