Posted by **Anonymous** on Wednesday, December 5, 2012 at 8:05pm.

First, why is the least common denominator of 3/4 and 4/8 not the product of 4 ad 8?

Also, why is the least common denominator of 5/9 and 7/12 not the product of 9 and 12.

Please explain both answers.

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**Ms. Sue**, Wednesday, December 5, 2012 at 8:09pm
They are not the least or the smallest common denominators.

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**Anonymous**, Wednesday, December 5, 2012 at 8:15pm
Sorry but can you please explain that more.

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**Ms. Sue**, Wednesday, December 5, 2012 at 8:24pm
The least common denominator of 3/4 and 4/8 is 8. It's the smallest number divisible by both 4 and 8.

The least common denominator of 5/9 and 7/12 is 36. It's the smallest number divisible by both 9 and 12.

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**Anonymous**, Wednesday, December 5, 2012 at 8:51pm
Ms. Sue i am very sorry but please explain that with more details.

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**Ms. Sue**, Wednesday, December 5, 2012 at 9:06pm
These sites have excellent explanations.

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

http://www.youtube.com/watch?v=kZUImLklXHk

http://www.aaamath.com/fra66jx2.htm

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**Anonymous**, Wednesday, December 5, 2012 at 9:34pm
But what do they mean when they say the product of 4 and 8 and of 9 and 12?

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**Ms. Sue**, Wednesday, December 5, 2012 at 10:34pm
Product is the answer to a multiplication problem.

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