Latitude and Longitude is usually reported in one of three formats, using degrees, degrees and minutes, or using degrees, minutes, and seconds. There are 60 seconds to a minute, and 60 minutes to a degree. Whichever of the formats is used, the smallest unit is often represented as a decimal.

Thus

47.89149246116762°, -121.65393948554993°

is the same as

47° 53.4895476700572′, -121° 39.2363691329958′

is the same as

47° 53′ 29.372860203432″, -121° 39′ 14.182147979748″.

To convert the decimal portion of degrees into minutes or the decimal portion of minutes into seconds, simply multiply the decimal portion by 60. To go up, divide by 60.

Update: I’ve written a little online converter here: http://ideaharbor.org/ll/.