pivot table column percentages

Is there anyway to display percentages in pivot tables, in terms of cell count vs total column count?

I have attached an example.
In each cell with 'XX.XX%' I want to display the percentage of the count for that cell divided by the grand total for that month.
E.G. the percentage cell for "2020-Apr, In SLA" should show 93.25% (using cell count 22715 divided by column count 24358).

Thanks