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# what is Least common denominator of 8,12,18

i really don't know the definition of it!!! Plsz HeLp!!!!

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- 1 decade agoFavorite Answer
To find the LCD, you should find the least common multiple of all three numbers

8= 8, 16, 24, 32, 40...72

12= 12, 24, 36...72

18= 18, 36...72

This way it would be 72

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- Anonymous1 decade ago
2

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- Anonymous1 decade ago
432. i think what you are actually trying to find is the least common mutiple. this is the definition: The Least Common Multiple (L.C.M.) of two numbers is the lowest number that can be divided both. It can be used to find the lowest common denominator when adding or subtracting fractions. Don't let the "least" in the name fool you - the LCM is no smaller than the largest of the numbers.

- Sandy SandalsLv 71 decade ago
2

That means it's the smallest denominator you can reduce the fraction to for all three of them.

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