I'm not sure why this wouldn't work for some of you.
The plugin will automatically replace the active members number on your forum home page with the active members number and percentage.
Try uploading the plugin and then adding this wherever you want the percentage to show up:
Code:
$activemembers_percent%
So if you want it to show up right after the number (like in the screenshot), then replace
with
Code:
$activemembers ($activemembers_percent%)
Let me know if that works for you.