tmontana on "ReplayFX/Pinburgh 2018"
Wednesday 7 March 2018 at 03:22
Quoted from InfiniteLives:2/840 = 0.0023809523809524% of the tickets went to the presale
The teacher part of me has to point out that you did the division but forgot the multiplication.
It's actually 0.23809523809524% 
Source: http://pinside.com/pinball/forum/topic/replayfxpinburgh-2018/page/5#post-4266931