How to move an object relative to the screen size in animation

I have animation for object. This object must move for Screen.width/3 to left or right from start position. It should work on different Screen resolutions (for example 1280x720 and 1920*1080, etc). Can anybody help to resolve this problem?

As far as I know, you can’t specify relative units in the animations themselves… What I would recommend would be to do a static animation, but then scale the object’s parent to match your screen size.