Copy and Paste mixed numbers such as 1/8000 of a second are recognized as dates

What is shown below is just a portion of a large.... very large table I was trying to copy and paste into Excel. Look on the left side below for the example of what I got after my paste. The area to the right shows what a few of the characters looked like in their original format (I used the dots to help with positioning in this post - apparently, what you type is not what you get so I added the dots)

So QUESTION - How is this "pre-corrected" so I don't have to manually correct each item, which by the way, I still don't know how to do, without turning each fraction into a "text" which then defeats the purpose I have in the first place!

Thanks!!

Jan-00 .........................1/8000
Jan-00 Jan-00...........................1/6400 1/6000
Jan-00..........................1/5000
Jan-00
Jan-00 Jan-00
Jan-00
Jan-00
1/1600 1/1500
1/1250
1/1000
1/800 1/750
1/640
1/500

Thank you for your reply.... but your suggestion (which I had already tried, but did try again) did not work..... 1/8000 of a second indicated in the field as 1/8000 still showed up in my spreadsheet as Jan-00

I am sorry............ that still did not work..... I still got the Jan-00 dates

The info is coming from this location http://www.scantips.com/lights/fstop.html

There is a lot of "merges" on the page, so I was trying to copy "from below the column titles" and only the first three sections, of four.

hey hey ...Thank you! So .... these numbers are now "text" .... I am not sure that is an issue for me... as I don't plan to exercise any numeric math functions.... however.... is there a way to convert the page back to a general numbering format and will that rid the page of those annoying little green warning triangles??
thanks again........ as I had not seen that little drop down box in the low right corner before..