You need at least two things to find something in common.
96
192
144
6
it equals 48
48
240
LCD(3, 16) = 48
48
lcd(6, 12, 16) = 48. 6 = 2 x 3 12 = 2^2 x 3 16 = 2^4 lcd = 2^4 x 3 = 48
36
Assuming you mean the LCM (Least Common Denominator of 2 fractions is the LCM of the denominators, which for 7/1 and 16/1 is 1), the answer is 112.