Subtract decimal hours
You can mix the two forms. Type 3, press 
, type 45, press 
, type 1.69, and press 
: . Press 
and 
to see the answer in hours, minutes and seconds: 2°3'36".
You can mix the two forms. Type 3, press , type 45, press , type 1.69, and press : 3 h 45 min−1.69 h. Press and to see the answer in hours, minutes and seconds: 2°3'36".
▶ Watch this step in the video (44:11)