If you mean how do you convert it to decimal hours, then multiply by 24 as
Excel stores hours as fractions of a day (24 hours)
With value in A1
=A1*24 result 129.55
Format the cell with the formula as General or Number
If you are saying you want it to display as 5 days 9 hours 33 minutes then
Try firstly reading again what your screen is telling you, and secondly
reading again what you were told to do.
You tell us that you got the value 15.36, but if you look again I think
you'll find it is saying 15:36, not 15.36 (unless for some unknown reason
you decided to custom format the cell as hh.mm with a full stop instead of
the customary colon in the time format). [If you want to understand why
it's saying 15:36, try temporarily reformatting as [h]:mm, and then
calculate for yourself what 24 times your original 129:39 is.]
Roger told you:
"Format the cell with the formula as General or Number
.... but how have *you* formatted the cell with the formula?
Read Roger's post again. Do as he said. Then see what answer you get.