I am relatively new into this ( 6 months or so). I only play Double Deck ($25 Table Min) with H17, no RSA, Double on any 2 cards, Double after Split, no surrender, Pen 65-70%. I use Hilo with Ace side count.

I would like to hear what people generally use for accuracy 1/2 deck, 1/4th Deck or something else. I was using 1/2 Deck so far and recently trying to use 1/4th which is slowing down my game significantly. Is 1/4th Deck accuracy practical? It is not hard to estimate 1/4th Deck but division by 1.25 or 1.75 is taking longer for me. I have found a way to make the division easier mentally like dividing the running count by 1.5 and 2 and taking an average instead of dividing by 1.75. But it is still a slow process for me. Hopefully, with more practice it will get faster.