What do you think the % symbol does in MATLAB? Answer: when not inside quotes (so a string) it creates a comment.
What do either of these strings of characters mean in MATLAB?
000000020F0D0
000000020F0D0%
Answer: Essentially nothing. It is just a list of characters. Inside a cell array as you are trying to put it, they do not even form a valid MATLAB syntax.
I might guess that perhaps you want them to be strings of some ilk, representing whatever it is you want them to mean, thus:
C = {'000000020F0D0%', '0000000281830%', '0071803F01CF0%', '0071803F6AA40%'};
But as you want to create that cell array, it is just a syntax error waiting to happen.
You cannot arbitrarily turn off the functionality of a % in MATLAB, any more than you can hope that MATLAB will know what it is that you might want MATLAB to do with that statement.
Since you appear to be creating these statements, then you probably need to create them as strings, thus with enclosing quotes, IF you want to create them as cell arrays.
