Count and Percentage of an aggregated field in tableau

Question

i am new to tableau, i have created a calculated field (as below) based on which I want the find the percentage.

If [x] = > 10 Then "A" 
elseif [x] < 10 Then "B" 
elseif [x] < 5 Then "C" 
END

I now need to know the percentage of A, B, & C, is this possible?

Answer 1

1. The calculation (call it 'Letter') needs to be as follows to avoid the current ambiguity between B and C (also use <= not =>)

   IF [X] < 5 Then "C" ELSEIF [X] < 10 Then "B" ELSEIF [X] >= 10 Then "A" END

2. Add letter to the rows shelf

3. Add x to the text mark and change it from sum to count by right clicking the pill

4. In the analysis menu, select Percentage of then Column