“Levi got up.
He left everything.
He followed Jesus.”
καὶ καταλιπὼν πάντα ἀναστὰς ἠκολούθει αὐτῷ.
Luke said that Levi got up (ἀναστὰς). He left everything (καὶ καταλιπὼν πάντα). He followed Jesus (ἠκολούθει αὐτῷ). Both Mark, chapter 2:14, and Matthew, chapter 9:9, said almost the same thing. They said that Levi got up and followed Jesus without any need to explain why or how he was doing this. At this point in other two gospels, Levi or Matthew was the 5th named apostle after the brothers Simon Peter and Andrew, and the Zebedee brothers James and John. However, for Luke, he was only the 4th, since Luke did not mention Andrew at all.