Demographic Data & Percentages
Percentages for any specific demographic may not add up to 100% due to the fact that not all followers are returned as categorized by the platforms.
Conversely raw numbers of specified followers in each demographic bucket may not have a product equal to your total follower count * demographic % due to the same reason.
For example: Instagram may not know the country for every single follower of an account so they only return the followers they have country information for. The percentages shown in the Demographic report are in relation to the total follower count so if any followers are categorized for a specific demographic when summing up the percentages it will not add to 100% due to uncategorized followers.