Nice example but I do no believe that this is quite right!

> 75% x$10 = $7.50 in rewards for the post Steem is at roughly $0.60 c currently so it would be $7.50 multiplied by 0.6 which is $4.5

At 100% SP rewards you would receive $7.50 / 0.60 = 12.5 STEEM in rewards. This is equal to 12.5 x 0.60 = $7.50. There can be a difference between the 0.60 average witness feed and the 0.60 market value of Steem of course....