TIME/Duration conversion & averages

Ok i always seem to struggle with time in BI and I've a project that its quite critical I can display values as hours and minutes, not deciaml time and not just whole minutes...

I have a tabel that contains the actual duration as a number and I have converted that into whole minutes, but when I try and create visuals etc... I can return average values that are in hours and minutes, Unless I use 

Measure 2 = (FORMAT([hours and mins], "hh:mm"))

But that is a text field, Great for Card visuals but do not work in charts.

Yet when I run an average across my actaul time coumn I get a decimal figure in my chart.

I have tried to format the column with the actual hours and minutes as duration etc... but it goes all over the place.

Seems like such a simple thing I want to do but I cannot get it to work and I know that displaying the values as decimal won't be considered acceptable