as the OP shown, 2.4% of the coins premined. However, it is a little bit strange because when I search for the genesis block with the following link: http://explorer.racecurrency.com/block/0000025a82ddff8f3df5368230851f73fa3ffd1ca3a1e8b7c843f3ab0f41fd9e No coin in the genesis block. What happened with this block? Anyway, thanks for your interesting findings, despite of these two links you shared didn't not show any evidence which can claim those coins belong to premined, fella.
Look at the originating wallets and you can follow them all the way back to the genesis block on Feb 1st...the day of launch.