Difference in two times over days

[SouthAfricanStan]

Each of A1 (time out) and E1(time returned) are in the custom format of
yyyy/mm/dd/ hh:mm
I need to calculate two results, for a car hire company:
1. The total time difference as days;hours;minutes.
Some clients are charged per day and if the vehicle is returned later than
one hour after a 24 (or multiple of 24) hour period then the client is
charged an additional full day's rate. eg if a vehicle has been used for 3
days and one hour (or less than one hour), the charge is for 3 days, but if
for 3 days and more than one hour the charge is for four days. In view of
this requirement:
2. The total time difference as days;hours
Any help will be appreciated.

 

[JE McGimpsey]

One way:

=INT(E1-A1) & " days; " & TEXT(E1-A1,"hh") & " hours"