Posted by me on Monday, December 3, 2012 at 10:23am.
4/5 to 7/15
= 4/5 : 7/15
= 15(4/5) : 15(7/15)
= 12 : 7
or (4/5) / (7/15)
= (4/5)(15/7)
= 12/7
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