Why would my truck be using gas so quickly?

I have a 2010 Ford F-150 that is a company vehicle. Today after driving roughly 20 miles to get parts it dropped from 122 Miles to empty to 32 Miles to empty. None of it was highway miles driven. The check engine light is not on, nor do I see anywhere it was leaking. What could be some causes?

Maybe the way you drive.

Sounds daft but have you changed the Distance to Empty from Kilometers to Miles as that would be
122 Kilo = 74.56 Miles - 20 Miles = 54.56
Or the other option (You do not say what your fuel gauge says)?
Does it have twin fuel tanks if so has you unknowingly switched tanks

Andy C