lowest common denominator of 4/5 and 7/15 would be 15 4/5=12/15
A single number cannot have anything in common. To find a lowest common denominator, you need to be adding or subtracting at least two fractions.
The lowest common factor of any set of numbers is 1.
That's two different things. The common factors of 350 and 420 are 1, 2, 5, 7, 10, 14, 35, 70, with 70 being the GCF. The least common denominator of 350 and 420 is 2100.
252252
7
2
LCM(12, 14) = 84
Assuming those are denominators of fractions you wish to add or subtract, you can use any common multiple of 4 and 14; the Lowest Common Multiple (LCM), often called the Lowest Common Denominator (LCD) especially when when referring to the denominators of fraction, provides the smallest numerators. For 4 and 14, the LCM is 28.
It is: 1330
It is: 70
100
The lowest common multiple (LCM) is: 70
It is: 70
It is: 1
It is 70
lowest common denominator of 4/5 and 7/15 would be 15 4/5=12/15