It may or may not be required. And the reason for the ambiguous answer is that there is no information regarding what arithmetical operation is to be performed.
Two or more fractions or mixed numbers are required to have a least common denominator.
That's the least common denominator or LCD.
The least common denominator.
This cannot be answered properly because at least two numbers are required.
This cannot be answered properly because at least two numbers are required.
This cannot be answered properly because at least two numbers are required.
This cannot be answered properly because at least two numbers are required.
This cannot be answered properly because at least two numbers are required.
This cannot be answered properly because at least two numbers are required.
This cannot be answered properly because at least two numbers are required.
This cannot be answered properly because at least two numbers are required.
This cannot be answered properly because at least two numbers are required.