Depends upon which site you check. But there are not 1040 delegates left. If you look at each state that has already voted and add up the delegates available, you get 1489 already allocated, leaving 983 delegate, of which 128 will be unpledged delegates. That only leaves 855 pledged delegates available. So even using your number of 694 delegates, that means Trump needs 543 delegates. 543/855= 63.5%, not 52%.
The 694 Trump delegate number I got from the NYT delegate tracker linked upthread.
The 1040 remaining delegates number I got from here: http://www.politico.com/2016-election/results/delegate-count-tracker
This lists Trump @ 673. But it doesn’t factor in all of MO, which according to provisional results should net another +12 to Trump, placing him at least 685. I’m not sure where NYT pulls the other +9 from, but that doesn’t change the arithmetic much.
I saw Cruz on Megyn Kelly tonight using similar Texamatics. I am sorry, but it just comes across as sort of sad. Whether you like it or not Trump is most likely going to get to 1237 delegates before the convention.
But lets use your math for Ted shall we? Ted has 411 delegates according to RealClearPolitics... he needs 826 more delegates to get to 1237. You say there are only 855 pledged delegates available 826/855=96.6%. How likely is it that Ted is going to get 96.6% of the remaining delegates? Using your math why hasn't Ted already conceded?
What he is talking about is that Five Thirty Eight as of yesterday did not have to (at least) 30 MO delegates which have been awarded now. Could be many more as over 20 still haven’t been assigned. When you add those Trump is at least 694.