Images from block doesn't keep ratio

I'm now working on this website : When I go in 366px width resolution with chrome, I can see that images are only width resized, height stay the same so ratio of image is not respected. Can you tell me what's wrong ? To insert image in block, here is my code : [column cols="6" end="1"][/column] Thanks a lot Christophe Bourgois Laxmi Web Agency
I founded the solution, in my insert img code, if I don't put widht and heigth in style, it's working.

Yes, you are right. CKEditor auto add image desmission in style property and we should remove it.