How many Americans voted? 66% or about 150 million is my guesstimate. From what we've all been hearing on the media, many of those were mailed-in ballots, and largely Democratic. Nora O'Donnell's team and others have been reporting all along about tallies in each state as the votes cast are being counted. None cast after Nov 3rd are counted, although if they were post-marked by Nov 3rd they can be counted.
These clarifications are important for everyone to understand so confusion doesn't reign in these final hours (or days) before the official declaration can be made.