Decimal Degree to DegMinSec conversion?

I am a land surveyor. I find it necessary to convert

Decimal Degrees to Degrees, Minutes and Seconds and vice

versa, yet I cannot find this function in Excel books or

the Help menu. This is a standard key on an HP

calculator, I would think that EXCEL would handle it.

For example:

25 deg 30 min 15 sec= 25.50147 degrees

or

25.50147 degrees = 25 deg 30 min 15 sec

Any suggestions

PS I can put each in a separate cell and divide min by 60

and seconds by 3600, but I can't convert the other way.

Thanks

Mike