score:5
Taking the liberty of assuming that the "116 lost pages" were similar in size and content to what was presented to the publisher for printing, I think we can uncover a reasonable estimate.
The Printer's Manuscript is the earliest complete pre-publication document we have of the original translation. Like the Original Manuscript, it was written by hand and had the addition of punctuation. While the scribes were different, it is probably reasonable to assume that the content would be reasonably similar overall.
This table provides a correlation to the current publication and the Printer's Manuscript. According to the table, 116 pages would cover the extant from 1 Nephi through Words of Mormon.
In narrow columns, new chapter divisions, cross references, footnotes, etc., the "116 lost pages" would be about 144 pages of the current typed version, or about 21% of the total translated pages.
In regards to the amount of content lost, the "116 lost pages" contained the "Book of Lehi" and coveredβaccording to the Words of Mormonβthe same time period as the books from 1 Nephi to the Omni. Nephi states some of the things previously recorded, perhaps in the Book of Lehi, which were intentionally left out of his personal account.