To express it as a decimal, you need to know the minutes and seconds as well.

Here's why:

* Longitude: Longitude measures your position east or west of the prime meridian (0 degrees).

* Degrees, Minutes, Seconds (DMS): Longitude is typically expressed in degrees (°), minutes ('), and seconds (").

* There are 60 minutes in one degree.

* There are 60 seconds in one minute.

To convert from DMS to decimal degrees, use this formula:

Decimal Degrees = Degrees + (Minutes / 60) + (Seconds / 3600)

Example:

If you have 127 degrees, 30 minutes, and 15 seconds (127° 30' 15"), the decimal longitude would be:

127 + (30 / 60) + (15 / 3600) = 127.504167°