There is none because the Least Common Denominator (or LCD) is the Least Common Multiple (LCM) of the denominators of two or more fractions.
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LCD(3, 26) = 78
This cannot be answered properly because at least two numbers are required.
It is not possible to give a sensible answer to this question. The least common denominator (LCD) refers to a multiple that is COMMON to two or more numbers. You have only one number in the question!
The lcd is the lowest common multiple (lcm) of 10 and 45 which is 90.
390