Formula to calculate percentage of visitor

[IH_Digital]

Can you tell me about formula to calculate percentage of Organic visits, Social Visits , Direct Visits , Referring Visits ,Other Visits in the dashboard page ?.

[DeanAndrews]

Are you referring to the GA dashboard as this can be customised to show any widgets?

If you are referring to GA in general then the percentages are calculated as a percentage of your overall sessions for the selected time period.