50% of the value shown is paid out in SBD and 50% in Steem.
For every dollar shown you receive one SBD, the Steem you receive is determined by the blockchain.
An example (curation rewards are not considered here: Your post is upvoted by someone with that much Steem Power, that you would get 1 Steem. 1 Steem is currently worth $1.92, so Steemit shows that your post is worth 1.92$.
After payout you get 50% in Steem, that means 0.5 Steem and 50% in SBD that means 0.96 SBD. It doesn't matter how much SBD is now worth in the markets.
ye before i thought that in your example 1 Steem is currently worth $1.92, i thought they show in SBD worth not in US dollar. And because sbd is always in system 1$ then its 1.92 sbd
It is shown in USD not SBD, right. That's why you receive so much SBD.