[libreoffice-users] Question about saving Excel 365 (.xlsx) files in LibreOffice Calc 6.4.6

Hi!  A friend of mine sent me an Excel 365 spreadsheet to get my help to
add a formula.  The spreadsheet is "simple", in that it had about 90
rows of data, with only one column being a numeric value.  Everything
else was plain text.  I added the formula (to sum the numbers in the one
numeric column) and when I saved the file, in XLSX format, I noticed the
file size was smaller.

Here is what I found:

Original file: 22kb

Calc 6.4.6 on Ubuntu 20.04:  16kb

Calc 5.1.6 (I think) on Mint 18.3:  9kb

Why would saving the file in Calc reduce the file size?

Thanks in advance!

Peace...

"The Other" Tom

-- 
/When I leave, I don't know what I'm hoping to find,
And when I leave, I don't know what I'm leaving behind.../

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