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September 23, 2014

September 23, 2014

Posted by **janie** on Thursday, April 28, 2011 at 7:54pm.

- math -
**drwls**, Thursday, April 28, 2011 at 8:01pm(1) Express numerator and denominator as products of prime numbers.

(2) Eliminate (cancel out) common factors of the numerator and denominator

Quite often, you can do these things "in your head".

For example,

5/15 = (5*1)/(5*3) = 1/3

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