Final answer:
The Laestrygonians destroyed all of Odysseus's ships except the one he was aboard.
Step-by-step explanation:
The question asks about a specific event in Greek mythology involving the Laestrygonians. This mythical tribe is featured in Homer's ancient epic, the Odyssey.
According to the epic, the Laestrygonians destroyed all of the ships belonging to Odysseus except for the one he was on.
Therefore, the number of ships destroyed was all but one of his fleet.