So I'll have a look at my post from 8 days ago. The payout was $19.
I received in practice 7.353 SBD, and 1.769 STEEM POWER
By your calculation it means that I got: 75% of $19 = 14.25.
Half of it as STEEM = 7.125, meaning STEEM was worth 4.0 about 15 hours ago. Bittrex agrees.
Now for the remainder 7.125 I should be getting 7.125 SBD, but I got more?
I assume the reason is because someone upvoted me before 30 minutes.