C 5/E
The C 5 chord consists of the C (Perfect unison) and G (Perfect fifth) notes, with E as the bass note.

How to play the C 5/E chord
- Play E as the lowest bass note in the left hand
- Find C (Root) on the piano keyboard
- Add G (Perfect fifth) — 7 semitones above C
- Press all 3 notes simultaneously to sound the C 5/E chord