2/12=1/6
The LCD of 1/6 and 3/4=The LCD of 1/6 and 1/4=12
Therefore, 2/12 and 9/12 have the same denominator.
They are equal to the original fractions.
LCD=12
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Put like that, you'd use 8. But if you write 2/8 as 1/4, you could use 4.
The LCD of 1/4 and 1/6 is 12
(1/4/2) = (1/2)(1/4) = 1/8 One eighth.
Lcd = 1 Lcm = 112
If 16 and 19 are denominators, their LCD is 304. If that's 1/6 and 1/9, the LCD is 18.