Time - convert from Decimal to Standard to Closest 15 - 52 doesn't work

[keen2xl]

Hi Skilled people

I have a work sheet to help calculate workers hours to the minute but want to convert it back to Standard time then to closest 15 mins

Can do by the looks hours up to 24hrs but when i try to convert the Total hrs for the week 52.48 it doesn't work

Needed it to say 52:28 (Stanard Time) and 52:30 (Closet 15 min)

Can it be done or is there a work around ?

Much appreciated

Thanks

Wrkers hrs 52 no good.png