The common denominator of any two or more whole numbers, such as 16 10 and 25, will always be one (1) because 'common denominator' refers to the denominators of two or more fractions or mixed numbers, not whole numbers. So, a set of whole numbers (x,x) would have to be converted to their fraction equivalents, i.e., x/1, which will always yield a denominator of 1.
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A common denominator is 75.
The word 'denominator' refers to the bottom number of a fraction. For example, 7 is the denominator of the fraction 3/7. As 16 and 25 are not fractions then there is no denominator of any kind. If the question refers to the Least (or Lowest) Common Multiple (LCM), then determine the prime factors of both numbers. 16 = 2 x 2 x 2 x 2 = 24 25 = 5 x 5 = 52 The LCM is the product of the highest power of each prime factor. The LCM of 16 and 25 is therefore 24 x 52 = 16 x 25 = 400
A common denominator, though not the least, is 150.