Convert from dms (degrees, minutes, seconds) to decimal form (degrees)

1) 118°44'15"

2) 48°30'36"

i am aware that my teacher only taught the students and i about converting dms to decimal form with only degrees and minutes. show how this work is done.

All I remember is:  1° (degree) = 60' (minute) = 3600" (second) and use the given numbers to put on the d° m' s"dd = d + m/60 + s/3600

1) 118°44'15" => 118/1 + 44/60 + 15/3600 = 118.7375 

same thing with 
2) 48°30'36" => 48 + 30/60 + 36/3600 = 48.51

If you need an equation, it would be y=2x+8, y would be how long it grew, x being weeks.if you need how long he was asleep, it would be 4 weeks if he started with no beard, the equation would be x=8÷2if he did have a beard before hand, the equation would be 2w+x=8