Card margin bottom

Hi, I’m trying to remove the margin between the image and the leftover, the white border, and I can’t do it, do you know how I could remove it?

<div class="card ">
          <div class="card-content">
            <a href="/tienda/" class=""> 
              <img src="" width="100%"> 

set display:block style to images inside cards

Okay, it’s working fine, thank you!!!