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

Kindly give me suggestion for the above requirement

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

Kindly give me suggestion for the above requirement

Hello, I got a question for retriving data. For example, if I use code like this: <apex:outputtext value="{!Case.Owner.Name}" /> and I can get a text show on my web page. But how can I know where does each value after dot come from, is that simply (object name) . (field name) . (data wanna retrive). But how can I know the exact name of data that I wanna retrive?  The example I showed is a bad example, cuz I assume that the name of data I wanna retrive maybe call Name, yet I dont know where to find it.     Thanks for helping.