From that site:
Dekalb County:
190/191 precincts:
VOTER TURNOUT TOTAL
58.97%
Ballots Cast: 322,400
Registered Voters: 546,711
Fulton County:
371/384 precincts
I could not find registered voters, but this site lists active voters for 2020 as : 808,742
https://sos.ga.gov/index.php/Elections/voter_registration_statistics
Here is a map of precincts still outstanding https://results.enr.clarity elections.com/GA/Fulton/105430/web.264614/#/reporting?v=268775%2F
Thank you! I was going nuts trying to understand the site I was looking at, of the results.
LOL