libGdx getting the delta value on touchDragged

Is there a way to get the starting coordinates of the drag?

I tryed something like this. I thought it would work, but it doesent. x and y are the values sent by the touchDragged method.
divisor is a value to scale the coordiates town to the level of playingfield.

fingerX = x / divisor;
		fingerY = y / divisor;
		DeltaX = fingerX - position.x;
		DeltaY = fingerY - position.y;
		position.x = position.x + DeltaX;
		position.y = position.y + DeltaY;