Table with columns adding to 100% width overflows/scrolls

[bridge]

I have a table, with 8 columns, whose cumulative width adds to exactly 100% of the table width. 2 columns have 20% width, and 6 have 10% width.

Even though theoretically there should be no overflow, the table seems to be too wide and an unwanted horizontal scroll is added:

There is no padding, margins, or gaps. Is this a result of some floating point error in the responsive engine?

[bridge]

If anyone in the future sees this, instead of adding all the widths to exactly 100%, choose one column to not have a fixed width, and the table will not do the annoying scrolling.