#NEWLINE# def run( self , table ) : #NEWLINE# #INDENT# '\n        :returns:\n            :class:`decimal.Decimal`\n        ' #NEWLINE# new_column = [ ] #NEWLINE# for row in table . rows : #NEWLINE# #INDENT# new_column . append ( ( ( ( new_column [ self . _after_column_name ] - row [ self . _before_column_name ] ) / row [ self . _before_column_name ] ) * 100 ) ) #NEWLINE# #UNINDENT# return new_column