Complex sentence: Florida became the 27th U.S. state in 1845, while its last county was created in 1925 with the formation of Gilchrist County from a segment of Alachua County.
Split into simpler sentences: Florida became the 27th U.S. state in 1845. Florida created its last county in 1925 with the formation of Gilchrist County from a segment of Alachua County.