i used to be able to do (setq org-duration-format '(("h" . nil) (special . 2)) to get decimal hours for clocking, like 43.22h meaning 43 hours and 22/60 minutes.
in recent org maint, this seems to show up like 2d 11:22. perhaps user error? what i really want is decimal hours for org-clock-display, /but/ hh:mm for modeline clock display. but i'm ok with evaluating the above form when i need to do org-clock-display if it is not possible to specify context.