How to convert degrees, minutes and seconds to degrees

Change angles to degrees only:

28 (degrees) 17 minutes 24 seconds

28 (degrees) 17 minutes 24 seconds
= 28.29 degrees

1 degree = 60 minutes
1 minute = 60 seconds
24 seconds = 0,4 minutes
17 minutes = 17/60 degrees
17.4 minutes
= 174/600 degrees
= 0,29 degrees

28 + (17)(1/60) + (24)(1/60)(1/60) = 28.0 + .2833333... + .006666... = 28.29 degrees