Width % in case layout style is responsive with PC

In the case that layout style is table, width % configuration will be easy to process. On the other hand, if layout style is responsive, how width % configuration is processed with PC?
Width % configuration is bellow in the subject site.
Date Column Width in % : 15%
Title Column Width in % : 55%
Venue Column Width in % : 15%
Category Column Width % : 15%

Joomla 3.10.11
JEM 2.3.3

For the responsive styling, it is important to read the instruction for responsive in the help sites of JEM!