Using and Converting GPS Coordinates

First, an explanation about where GPS coordinates get the N/S/E/W designator.  The Earth is divided into hemispheres.  North/South, and East/West.  The Equator separates North & South, and the Prime Meridian (which passes through London), dives the globe into East & West.  This is important to know when reading GPS coordinates because they are starting points of reference.  Since the world revolves around us here in the US,  every GPS location here in the States is N and W (North of the Equator, and West of the Prime Meridian)  Sometimes instead of N/S/E/W, GPS coordinates will be shows with + or -.   Using the United States again as an example, GPS coordinates up here at + for North, and - for W, which happens to be just like our time zones. (Example, California is -8 GMT)

Here's the GPS coordinates for The Batch Plant in Lake Mead
in 3 different common GPS formats.

To convert Degrees/Minutes/Seconds to Degrees/Decimal Minutes:
Divide the seconds by 60, and put this number after a decimal with the minutes.
With the Batch Plant example: 36° 2'27.29"N (divide 27.29 by 60, then put the result as a fraction after the minutes) = 36° 2.455'

To convert Degrees/Decimal Minutes to Degrees/Minutes/Seconds:
Multiply the fractional minutes (the minutes after the decimal) by 60, and make the result the seconds.
With the Batch Plant example: 36° 2.455'N (multiply .455 by 60, and the result is the seconds) = 36° 2'27.29"