86 degrees 23 minutes 12 seconds - 67 degrees 36 minutes 50 seconds = 49 degrees 28 minutes 52 seconds / 4=

86 degrees 23 minutes 12 seconds - 67 degrees 36 minutes 50 seconds = 49 degrees 28 minutes 52 seconds / 4=

86°23‘12’‘-67°36’50‘’
=85°82‘72’‘-67°36’50‘’
=18°46’22‘″
49 degrees 28 minutes 52 seconds / 4 = 48 ° 88 ′ 52 ″ / 4 = 12 ° 22 ′ 13 ″