DateTime SWQL Question

I need help converting this to SWQL : This is how far i got.....

convert(varchar(10),(DATEDIFF(HH,0,GETDATE()-MAX(Events.EventTime))%24 ))+' Hours '

This is how far i got.....

ToString(HourDiff(GETDATE(),MAX(Events.EventTime))%24)+' Hours '

The % 24 is giving me the issue, i guess that function doesn't exist in SWQL unless it does and i need to know the equivalent any help would be awesome!