Display Screen or Portion Thereof with Animated Graphical User Interface

1. Display screen or portion thereof with animated graphical user interface

1 . 1 : Front

1 . 2 : Front

The ornamental design for a display screen or portion thereof with animated graphical user interface is shown and described; the outer perimeter shown in broken line in the drawings illustrates a display screen or portion thereof and forms no part of the claimed design; the other broken lines illustrate portions of the graphical user interface that form no part of the claimed design; the claimed design pertains to a screen where the interface for entering authentication numbers can expand (or contract) according to user input; fig. 1 . 1 shows front view of a display screen or portion thereof with animated graphical user interface; fig. 1 . 2 shows front view of a second image thereof; the appearance of the transitional image sequentially transitions between the images shown in figs. 1 . 1 - 1 . 2 ; the process or period in which one image transitions to another image forms no part of the claimed design.