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First, you have to have a lowest common denominator.

Eg: 1/2 - 6/13

The lowest common denominator is 26, because 13 * 2 is 26.

You multiply 1/2 by 13, to make the denominator 26, which equals 13/26, then multiply 6/13 by 2 to get 12/26.

So the equation with the lowest common denominators now plugged in is:

13/26 - 12/26

Subtract the numerators (13 and 12), so the answer is 1/26.

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โˆ™ 2009-06-01 19:45:16
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