Posted by Julie on Saturday, February 19, 2011 at 11:32pm.
(2/5 - 1/3)/(2/3 - 3/4)
Find the LCD for the numerator, 15
Find the LCD for the denominator, 12
(6/15 - 5/15)/(8/12 - 9/12) =
(1/15)/(-1/12)
Invert the denominator and multiply,
1/15 * -12/1 = -12/15
Reduce the fraction
-12/15 = - 4/5
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