Least common denominators are the smallest denominator you can go without the numerator being a fraction or decimal. 12/20 can be defined as 6/10 or 3/5, depending on the problem.
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It means Lowest Common Denominator.
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.
Impossible to answer - the word 'common' means you need to be comparing it to something else !
Note: numerator is the top part of the fraction, denominator is the bottom part. 1) Find a common denominator. It may be the least common denominator, but it need not be; just multiplying the denominators also gives you a common denominator, not necessarily the smallest one. 2) Convert each fraction so that it has this common denominator. This means multiplying numerator and denominator by the same number.
it means when two denominators can reduce fast