Showing grand totals as a % of the overall grand total

Good afternoon

As per the attached example could you let me know how I show the Row Grand Total as a % of the Column Grand Total whilst still keeping the monthly totals as a figure

Having to calculate it by putting in a simple formula but could the pivot table options do this?

Thanks

Mark

Hello!
If I understand correctly, this formula should be sufficient in B7 =B6/$E$6 (to be copied to the right)

Regards,
Mario