Board Thread:Support Requests - Designing Your Wiki/@comment-35289850-20200816172211/@comment-45117243-20200816174438

Percents can work perfectly when the contents come in percents too, but wikitext imgages cannot do that, as far as my knowledge reach.

And you are right it's not centered yet, beacuse centering does not help when the picture is greater than the border. But we are going to solve that. We'll add a div with negative margins on the sides:

 Text