How do I recapture a deleted files in numbers

Here's a relevant Apple support document::

Use Time Machine to restore deleted files or older files

SG

Deleting a file initially moves that file to the Trash folder. If you haven't yet emptied the trash, you should be able to find it there.

Assuming you have time Machine (or some other backup system) running, you could also search for the file in Time Machine, and restore it from there.

Regards,

Barry