That being said, the completion percentage can be slightly misleading, because I remember Treasure of Nadia having several updates near the end where the percentage of the previous release was retroactively lowered. E.g. one update brought you to 96%, and the next one releases as 97%, but if you ported your save file, it would show up as 95%, so that you can still go up 2% while playing through the new content (1% for the story, 1% for the kamasutra page).
So The Genesis Order is currently around 25% complete.