18°15'27" = (18 degrees) + (15 minutes) + (27 seconds)
18°15'27" = (18 degrees) + (15/60 degrees) + (27/3600 degrees)
18°15'27" = (18 degrees) + (0.25 degrees) + (0.0075 degrees)
18°15'27" = (18+0.25+0.0075) degrees
18°15'27" = 18.2575 degrees
18°15'27" = 18.26 degrees
Final Answer: 18.26 degrees