GetPercent.ps1

Class PercentProgress
{
    [DateTime]   $Start
    [DateTime]     $Now
    [DateTime]     $End
    [Float]    $Percent
    [TimeSpan] $Elapsed
    [TimeSpan]  $Remain
    [TimeSpan]   $Total
    PercentProgress([String]$Start)
    {
        $This.Start = [DateTime]$Start
    }
    [Object] GetPercent([Float]$Percent)
    {
        $This.Now     = [DateTime]::Now
        $This.Elapsed = [TimeSpan]($This.Now-$This.Start)
        $This.Percent = $Percent
        $This.Total   = [TimeSpan]::FromSeconds(($This.Elapsed.TotalSeconds/$This.Percent)*100)
        $This.Remain  = $This.Total - $This.Elapsed
        $This.End     = [DateTime]($This.Now + $This.Remain)

        Return $This
    }
}

# Suppose the file is located at "C:\Users\user\Download\download.zip"
$File     = [System.IO.FileInfo]::new("C:\Users\user\Download\download.zip")
$Progress = [PercentProgress]::New($File.CreationTime.ToString("MM/dd/yyyy HH:mm:ss"))
$Progress.GetPercent(0.1)