The point is that those are 2 separate and distinct units. I'm not saying it's not a valid representation of time. I'm say the units in this case are actually hours and minutes, not only hours. It is compounded by the fact that the title is talking about time in a way that is ultimately also a ratio (something a colon is also used to represent), the ratio of hours on the device to the hours in a day. There were many other ways to represent this data that would have been less ambiguous, more clearly showing real differences at a glance, and paying attention to using more appropriate significant digits.

This place should be called mapshitposting for how often actual map enthusiasts get voted down for pointing out amateur mapping and statistical blunders here.