Simplify the following text for a Grade 5 native English-speaking person.
Original: The residents of unincorporated Deltona voted in September 1995 to incorporate Deltona as a new city , after two previous failed attempts to do so in 1987 and 1990 . A seven-member commission was elected , and as of December 31 , 1995 , the City of Deltona became official .
Simplified: Deltona is a city of Florida in the United States .