Time Format functions for converting to am/pm in SSRS

e.g. smmActivities table and the time here is stored in form of integer values.

How to convert int field into time (am/pm)

=Format(TimeSerial(0,0,Fields!starttime.Value),"hh:mm:ss tt") - 12 hour clock
=Format(TimeSerial(0,0,Fields!starttime.Value),"HH:mm:ss tt") - 24 hour clock