The chord C#/E that is shown here contains the notes: E, G#, C#, F. The root of the chord is C# (The lowest sound - the bass - is E). The scale from which the chord is derived is Major, and the degrees of the scale are: 1, 3, 5.
To play the chord C#/E shown above, place your fingers as follows:
On string number 5, on fret number 7
On string number 4, on fret number 6
On string number 3, on fret number 6
On string number 2, on fret number 6
On string number 1 (the thinnest), on fret number 9
Start strumming from string number 5 (notice not to play string 6).