How to Count backwards in %

I have a simple animation that plays once for 20 seconds and I managed to get the code to display its total progression from 0 to 100 (I’m using text render to show it)

How do I make it go backwards so it starts from 100% down to 0% instead?

use a subtract node.

what you have above, then route the number you were printing to: (100 - <result of multiply by 100&gt)

alternately, (1 - <result of divide by 20>), before the multiply by 100

What Do You Got There Numbers? - YouTube LOL

Also these may help with visualizing what VictorRachels is suggesting:
Suggestion1

Suggestion 2: