two values in Label in ssrs

How i can display two values in same label.but i want to show second value in bracket().i am using this expression =round(Fields!MegaBytes.Value,0).ToString() & " " & (round(Fields!MBPerSub.Value,0).ToString())it is giving me proper result.but second value(MBpersub) is not diplaying in bracket().for e.g: 400 (55555).