The reduction from the SPS (10%) and the 50/50 (33%) combine to 40% when taken together. This will be the base reduction applying to all posts before taking the CLRC into account.

For the CLRC, if your post earns more than a certain amount (16 Steem, i.e. $6.40 - according to the figure in the original post, although I'm still to run the figures on this) then you will be hitting linear and 40% will be the reduction. If you earn more than this break-even level then you will get a slight raise (i.e. less than a 40% reduction), as the reductions made by the CLRC on small value posts will end up being spread over larger value posts.