That’s 43.2% alliance.
But as mentioned earlier in the other thread, that’s apparently a site that only uses warcraftlogs as a source, so it’s not indicative of actual population figures but rather just the raiders who logs their raids.
And you apparently decided to only use the PvP realms as a source, when a lot of Alliance “fled” with free migration to PvE servers during phase 2.
If you narrow down the parameters even more, then you have wild fluctuations from server to server. But it’s the overall that matters, because that’s indicative of the true faction split of players as a whole in EU.