Posted by **ALi** on Sunday, March 23, 2008 at 4:34pm.

I need a reveiw on how to use the LCD least common denominator

to add and subtract

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**SraJMcGin**, Sunday, March 23, 2008 at 5:01pm
Thank you for using the Jiskha Homework Help Forum. Hopefully, this will help:

http://www.helpwithfractions.com/least-common-denominator.html

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**SraJMcGin**, Sunday, March 23, 2008 at 5:03pm
P.S. Something here may also help:

1. http://www.lessontutor.com/sv1.html

2. http://www.math.com/school/subject1/lessons/S1U4L3DP.html

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**Serena**, Sunday, December 9, 2012 at 7:17pm
Is 6/28 the lowest common denominator or 3/7

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