I have created a custom number field in case object . It is called Overall Minutes When I run a report, I get the sum of all the minutes at the bottom. I would like it to be displayed as hours and minutes. i have tried the below formula but i'm facing issue .
ROUND(Case.OverAll_Minutes__c:SUM)/60 & "Hour(s)"
Error: Invalid custom summary formula definition: Incorrect parameter type for operator '&'. Expected Text, received Number