3826941 - Why is there an increase in the number of expense reports going to Concur Audit Service?

Why is the selected number of expense reports for random audit for a specific group higher than the expected 25%?

Example: We noticed that if 100 expense reports are submitted for the UK group, more than 25 expense reports will be selected for random audit. 

Clients using Percentage for Type on their Random Audit Rules, will notice that the actual percentage of expense reports flagged by the rule might be higher or lower than expected within a month and leads to a higher than expected number of audits being performed by the Concur Audit Services team. , KBA , CON-CA-ADM , Administration , Problem