It is: 18
126
If 16 and 19 are denominators, their LCD is 304. If that's 1/6 and 1/9, the LCD is 18.
All Factors of 54:1, 2, 3, 6, 9, 18, 27, 54
LCD(9, 21) = 63
LCD(6, 27) = 54
lcd(9, 6) = 18.
54
54
It is: 18
It is: 18
The lowest common denominator of 6 and 9 is three.
18
90
126
3
It is: 144