Android : android touch coordinates normalized for multiple screens

I am trying to get the exact touch coordinates for multiple screens. After testing it seems this is not working exactly...

public boolean onTouch(View v, MotionEvent event) {
    touchX = (int) event.getX();
    touchY = (int) event.getY();

    convertedX=touchX/(double)displayWidth;
    convertedY=touchY/(double)displayHeight;

then I am saving the converted x/y coordinates....and then when loading on another phone I am translating those coordinates by:

                String pivotX = object.getString("pivotx");
                String pivotY = object.getString("pivoty");

                //convert pivot points
                double x =(double)Double.valueOf(pivotX) * displayWidth;
                double y =(double)Double.valueOf(pivotY) * displayHeight;
                final int pivotConvtertedX=(int) x;
                final int pivotConvtertedY=(int) y;

It seems like something is off here...Anyone know what I am missing?