Count ALL irrespective of table rows?

[Creative_tree88]

Hi all - this should be easy, but I'm struggling...I need to count ALL, in a second column in a table, to then show this as an overall % per row?  If you see the screenshot below, I need to understand how to perform a simple count of everything, but keep it on all rows, irrespective of the field ('Referring' in this case)?  I need to use this to calculate %, as in the screenshot:

If there's a better way of doing this, would love to hear suggestions!  Many thanks indeed.

Kind regards

[Arul]

@Creative_tree88 ,

for Report count all use the below measure,

Report count All = 
CALCULATE ( SUM ( 'Test Table Name'[Report Count] ), ALL ( 'Test Table Name' ) )

to find percentage(%) use the below measure,

% = 
DIVIDE ( SUM ( 'Test Table Name'[Report Count] ), [Report count All] )

see the attached screenprint for the results,

Thanks,