Creating a rectangle inside of a rectangle (AS3)

I would like to create a rectangle inside of a rectangle, starting approximately 15% inward from the right side of the other rectangle.

Can anyone help me with this? I know how to create rectangles with:


var newHotRect:MovieClip = new MovieClip();
newHotRect.graphics.beginFill(0x00FF00); 
newHotRect.graphics.drawRect(0, 0, 100, 100); 
addChild(newHotRect);

But how would I make another rectangle on top of that (the black one pictured) that is approximately 15% from the right?

I toyed around with .right, and .bottomright with no success. Can anyone lead me in the right direction? or even finding the x and y of the upper right or bottom right side of a rectangle?