What is the unit used for measuring metrics for an Azure sql database?

I am running a script to get back some metrics for an Azure sql database.

$metrics = Get-AzMetric -ResourceId $databaseResourceId -MetricName "dtu_consumption_percent" -    StartTime (Get-Date).AddDays(-100) -EndTime (Get-Date) 
$sumOfAverages = 0
foreach ($metric in $metrics.Data) {  
     foreach ($data in $metric) {
         # Add the average value to the sum
         $sumOfAverages += $data.Average    
    }
}
$sumOfAverages

But when I get the $sumOfAverages it outputs a value of 880.75.

What is that value measured in? It is %, so 8.8075 % of the dtuis set on the database. So if the DTU is 200, then it only used 8% of it. Is that right?

I have run some scripts to get the value, but do I need the metric?