The common denominator of any two or more whole numbers, such as your example of 19 8 and 5, 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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The common denominator of 5/8 and 3/4 is 32.The lowest common denominator (LCD) is 8.The highest common denominator (HCD) is 32.
To determine which fraction is larger, we need to find a common denominator. In this case, the least common denominator is 8. When we convert 3/4 to have a denominator of 8, we get 6/8. Comparing 6/8 and 5/8, we can see that 6/8 is larger, so 3/4 is greater than 5/8.
82
40
LCD(5, 6, 8) = 120.