It's not obscuring. Think about it a bit more. guardian(s) = mother and/or father household = guardian(s) + child Before 20% of mothers worked. Now 70% of gu

It's not obscuring. Think about it a bit more. guardian(s) = mother and/or father household = guardian(s) + child Before 20% of mothers worked. Now 70% of guardians (including both adults if there are two) work That actually indicates a net increase even greater than indicated in the article since households where there is a working mother but non-working father would not be included in the 70%.