Original sentence: Shkreli came to public attention in September 2015, when Turing Pharmaceuticals obtained the manufacturing licence for Daraprim, an out-of-patent medicine, and proceeded to raise the price by 5,455 percent (from $13.50 to $750 per tablet)
Edited sentence: Shkreli came to public attention in September 2015, when Turing Pharmaceuticals obtained the manufacturing licence for Daraprim, an out-of-patent medicine, and proceeded to raise the price by 5,455 percent (from $13.50 to $750 per tablet), an action described by many as price gouging