What is the common denominator for the question: 1/2, 3/7,and 3/4?

I need help find out what the common denominator is! thanks!
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1 Answer

2 = 2

7 = 7

4 = 2 * 2

It's like we're making a parts list.  In this case our parts list is 2 * 2 * 7 because that's the list of parts needed to make 2, 7, or 4.

2 * 2 * 7 = 28

Answer:  The least common denominator (LCD) is 28.
by Level 13 User (103k points)

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