The odd rating 5/7 represents a "perfect score".
On december 2015 a Facebook screenshot showing a discussion between "the proud Trump supporter" Brandan Sullivan, who rates the film Fight Club with a 5/7, and a guy called Robert Graves got popular on imgur. Brandan Claims later that Fight Club deserved a "perfect score".
5/7 is now frequently used on Reddit if someone wants to give something a 11/10 rating.
Fight Club: 5/7 Movie
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