having an error says Failed to load resource: the server responded with a status of 404 (Not Found)

I don't know why but I'm having a problem get the image in the path /public/img/default.png

<img src="/" width="100%">

I believe I have the right path but it says Failed to load resource: the server responded with a status of 404 (Not Found)

here's the database enter image description here

via Chebli Mohamed