Unable to add Duration data format to cells with formulas in them
I have a spreadsheet with calculations of different times, as numbers of minutes. The sum of these times are in a formula, expressed in a whole number representing minutes as well. I'm unable to change the format of the formula cells to express duration; when I select it from the dropdown menu, nothing changes. Any thoughts? I'd really like to see the minutes converted to hours and minutes, and not just divide by 60 to get hours and decimal portion of hours.