A floorlength petticoat (though I actually thnk it was meant as a skirt, think grunge).
Turned a kneelenght one. I sewed the bottom part to the waist.
I didn't know what to do with this skirt. The right idea just kept evading me. Until it dawned on me, that I could just do the simplest of all skirt refashions: Shortening.
(I am sorry for the selfie and the dirty mirror, my camera was acting up, so I had to use the camera in my mobile phone).