Loading screen, how to get the percentage completed?

[SlayerLegendz]

I have absolutely no idea how to get the percentage done of the loading screen.
Any help is appreciated. Thanks

[editline]29th May 2016[/editline]

The percentage of how much you're downloading is completed.
You know the drill, 0 is nothing done, 100 is finished.

[Sapd]

Look here: [url]https://wiki.garrysmod.com/page/Loading_URL#/Javascript_functions[/url]

There is a SetFilesTotal and a SetFilesNeeded function called by the client.

So simple:

var percentage = 0
var totalFiles = 1
function SetFilesTotal(total)
{
    totalFiles = total;
}

function SetFilesNeeded(needed)
{
    percentage = (totalFiles-needed)/totalFiles;
}