You are right. I made a simple math mistake. I've corrected it now. Thanks.
You can still keep using the 5.5% number if you want, by the way. Really any number between 5.375% and 6.344% would technically be acceptable for the percentage of newly issued STEEM going to new SP (although the lower end of that interval is unrealistic). And then correspondingly, that percentage subtracted from 7.75% is the percentage of newly issued STEEM going to new SD. The exact percentages within those intervals depend on voting behavior. If no one (including the author) was ever to vote on a post/comment in the first 30 minutes after its creation, then the numbers would be 6.344% to new SP and 2.906% to new SD.
I'm curious. How are you aware of these precise algorithms? Are you studying the source code or privy to some developer discussions some where?
It's all in the public source code.
Okay so that means you have already a significant investment of time in the Steem blockchain code base. You do realize that for someone like myself who has never studied the Graphene blockchain nor the Steem modications, I would be digging around for fairly long time before I'd be able to figure that out from the source code.