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{{ printedBook.courseTrack.name }} {{ printedBook.name }} The least common denominator of two fractions is the least common multiple of the fractions' denominators.

In the example above, it's found by multiplying the denominators, $3⋅2=6.$ Sometimes, the least common denominator (LCD), is lower than multiplying the denominators. For example, $65 +41 ,$ has the least common denominator $12$ since $6⋅2=12$ and $4⋅3=12.$