LCD(5, 8, 7) = 280
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The least common denominator (LCD) is 630.
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 common denominator is 28.
The Least Common Denominator of 3/4 and 7/8 is 8.
4/7 and 3/5 have an LCD of 35 since they 7 and 5 have no common factors.