From the amount measured at payout time (which could be different from the numbers you see during the 12 hours period, because it adjusts itself according to market price for Steem and Steem Backed Dollars) , 25% of that amount goes to curators of your post, and the remaining 75% that goes to you is split in two : half is paid in Steem Backed Dollars, and half is paid in Steem Power.

https://steemstats.com is very useful to see how many votes you used in the last 24 hours, as well as showing you your "voting power" (which goes down by a small amount every time you upvote or flag a post or comment), it is usually best to try and keep that number above 75%, otherwise your votes have less "weight" and impact.

Hope that was a bit useful :)