Half + 15% = ???

This article from http://www.providencejournal.com/news/20161027/new-technique-may-prevent... inaugurates a long-overdue series of unimportant but annoying-to-me math errors

Paul Shapiro, who until recently was the Humane Society of the United States' vice president for farm animal welfare, said he was "overjoyed" to hear of Vital Farms's investment in the technology. Shapiro, now the organization's vice president for policy, said as many as 65 percent of eggs laid to U.S. laying hens are wasted, because the half that are males end up killed, and as many as 15 percent are infertile.

Here, the presumption seems to be that because half the chicks are male, that's 50%, and 15% are infertile, so 50%+15% = 65%. Except that infertile eggs don't produce chicks, so male chicks are half of only the 85% viable eggs. Would the meaning be different if Shapiro had said as many as 57.5% of eggs are wasted? Probably not.