  : I agree with the deletion. See WP:ELNO #8: WP doesn't want to link to material that requires external applications such as Excel. That other links exist is not an argument to include another link. Although I agree the current article does not do a good job of explaining or showing the bit encoding (IEEE 754-1985 makes an attempt), I don't see the Excel sheets being so helpful that I'd override #8. For our purposes, a few specific examples with text and a static diagram can be better than a program that can handle arbitrary values. Although the spreadsheet may help you to explain the encoding to others, the layout is busy, takes some effort to interpret, and begs some familiarity with Excel. The spreadsheet took a lot of commendable effort, but I don't think it is an appropriate external link for this article.   