There is none because the Least Common Denominator (or LCD) refers to the Least Common Multiple (LCM) of the denominators of two or more fractions or mixed numbers. Even if you converted your whole numbers (x) to their fraction equivalents (x/1), the LCD would always be 1.
A common denominator, though not the least, is 40.
It is: 40
The least common denominator (LCD) is 40.
40
160
A common denominator, though not the least, is 40.
40
It is: 40
The least common denominator (LCD) is 40.
40
120
40
It is 80
200
360
360
120