Top: the burst mass fraction of the QPE hosts and the control galaxies vs. the time since burst. The QPE hosts are shown in various shades of blue according to their galaxy classification (Section 3.2). The black dotted line indicates a burst mass fraction of 1%, so the blue data points above that line are the QPE hosts that are considered to have a high burst mass fraction. Bottom: dust attenuation of the QPE hosts and the control galaxies vs. the time since burst. The data points corresponding to QPE hosts are labeled with the QPE names.