title_body: How to avoid image distortion when convert my .epub to .mobi
upvoted_answer: Here is the css I use for my kindle images: 
  
  div.image-container  {
  width: 95%;
  margin-left:  auto;
   margin-right:  auto;
    }
  
  div.image-container img {
   width: 100%;
   display: inline;
   }
  
  
  The goal I wanted here was to have an image cover 95% of the screen, with the image in the center. You could change the 95% to 25% if that is what you want. I do not think the height property has any function in your code. 
  
  The idea behind responsive web design (and responsive ebook design)  is that the images will adapt to the different screen sizes.  You can use css media queries to change the css for your images and div depending on screen size. (I describe it here: https://kdp.amazon.com/community/thread.jspa?messageID=1005910 ) 
  
  Kindle definitely supports the css width property and min-width on KF8 devices and apps. But it does NOT support the max-width property. Hope this helps.