No can do...and leave as a number, anyways. tables are calculational tools and MATLAB is NOT a spreadsheet and the view of the table content is not intended as a formatted presentation-worthy display format.
If you think you simply must show the % sign, you'll have to do something like
>> array2table(string(compose('%3d%%',randi(100,10,1))),'VariableNames',{'Data'})
ans =
10×1 table
Data
______
" 5%"
" 91%"
" 95%"
" 50%"
" 49%"
" 34%"
" 91%"
" 37%"
" 12%"
" 79%"
>>
Of course, then you get the unavoidable double-quotes around the value to show you it is a string array -- if you use
>> tT.Char=char(tT.Data)
tT =
10×2 table
Data Char
______ ____
" 5%" 5%
" 91%" 91%
" 95%" 95%
" 50%" 50%
" 49%" 49%
" 34%" 34%
" 91%" 91%
" 37%" 37%
" 12%" 12%
" 79%" 79%
>>
and store as char() array, then it looks pretty but now an individual value isn't a single entitiy but a char() string array -
>> tT.Char(3)
ans =
' '
>> tT.Char(3,:)
ans =
' 95%'
>>
-- which shows you have to access it by both indices to retrieve the whole string. All in all, this is highly unlikely to be useful no matter how you try to mung it into something it isn't.
