Converting individual cells within a range from minutes to decimal hours

Hello all,

I currently have a range of cells I14:BV900, with some of the cells containing times in minutes simply in the format of a number ie. 70 not 1:10. Is it possible to write a macro that says

FOR Range I14:BV900

DIVIDE each individual cell within above range by 60 and output to 3 decimal places in the same cell as before.
(so if for example 20 was in I15 and the macro was run when a button in the spreadsheet is clicked it would then show 0.333 afterwards)

Cheers for everything you do guys, learning quick but would be very stuck without this forum sometimes!

David