1/5
20/28Divide both the numerator and denominator by 420/28 = 5/7
17/105
28
The GCF is 42.
600/420 = 10/7
It is: 420
the lowest common multiple of 28 and 30 is 420.
The lowest common factor is: 1
The lowest common multiple (LCM) of 5, 7 and 12 is 420.
The LCM is: 7,980
The LCM is: 420