LCD means lowest (or least) common denominator, and that implies there must be at least two fractions involved for something to be common to both of them. There is, therefore, no sensible answer to this question.
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LCD(49, 72) = 3528
24 = 3 x 8 9 = 3 x 3 LCD = 3 x 8 x 3 = 72
There is none because the Least Common Denominator (or LCD) is the Least Common Multiple (LCM) of the denominators of two or more fractions. Even if you converted your numbers (x) to their fraction equivalents (x/1), the LCD will always be 1.
The LCD or LCM is 360
LCD(22, 33) = 66.