This does not have an answer as it is asked. The key word is common. In order for a denominator to be common, you need 2 or more numbers to get something that is common to all of them.
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The least common denominator of a set of denominators is the smallest positive integer that all the denominators can divide into evenly with no remainder.
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 least denominator for a number is itself.
the least denominator is the bottom number of a fraction that u use the least
Least common denominator means the LCM (least common multiple) of the denominator of a set of fractions. However, here is only 1 number provided in the question, 72, and even then 72 is not a fraction. Therefore, there is no least common denominator for 72.
51 is a prime number. Therefore the least common denominator would be 51*4.51*4=204
You need at least two denominators to find something in common between them.