How should i understand 70% value in this Azure Batch formula?

Khoi Thinh Azure batch service extracts samples of different kind of metrics about your pool every 30 seconds , when you specify $PendingTasks.GetSamplePercent(180 * TimeInterval_Second); what you are doing essentially is telling batch to calculate the number of samples it collected during 180 seconds , if you think about it, the right answer seems to be how many 30 seconds are there in 180 seconds ? 180/30 is 6 samples during 180 seconds, 6 here is 100% but because of how batch works the samples are sometimes delayed and not collected as expected , 70% represents the percentage of the actual collected samples which is equal to 4.

the collected samples using $PendingTasks.GetSample(180 * TimeInterval_Second) represents a vector of values (pending tasks) and the average number on that list will dictate the number of nodes you will end up using