I'm trying to fully understand this, too. As I read State Constitution Article 7, Section (2)b on this, it says 60% of the votes cast, and 40% turnout when compared to the number of voters in the same district in the last general election in that district.  

So I find the last general election for Federal Way SD to be November 2015, which had a turnout of 23,504.  

40% of 23,504 rounded up is 9402.

So I think with 9.527 accepted and 6,373 rejected votes as of the Nov. 7, 2017 count posted on the King County website, I think the turnout threshold is met.

So then when all votes are counted only the 60% threshold remains.  It is currently at 59.92% accepted... so close but currently not passing, could go either way.  Does not need to get to 12,781 yes votes (which is 40% of 21,301, which I could not validate), it just has to be 60% of those voted beyond 9,402 total votes?

Is my logic correct?  Or am I missing a general election issue in Federal Way in 2016, or other error?