Setting gameobject position by a percentage of screen

I am having trouble finding a way to set a gameobject’s position with regards to the screen size. I am building a 2d game that I will be putting on iPhone, iPad, and Android. I need to be able to set the object’s position to a percent of the view.

Try some of these methods:
this one and this one

Generally, just look at the Camera functions in here , you could find something useful.