The parent comment is clearly referring to the HN headline, not the article itse...

x1798DE on July 10, 2014 | parent | context | favorite | on: Study: Half of black males, 40% of white males arr...

The parent comment is clearly referring to the HN headline, not the article itself. Since young men do not massively outnumber young women, it is not the case that 40% of all US youths have been arrested.