Thanks for the reply. Like I said, I'm new to all of this, so bear with me. Let me further clarify what I'm trying to do.

I have a task that will take 4 days to complete. I would like to allocate 2 hours of that task to one of my resources (Resource A). To do so, I opened the task information for that task, clicked the "Resources" tab, then assigned Resource A. The "Units" column in the "Resources" tab takes a percentage. So to allocate 2 hours (out of a total duration of 4 days--96 hours), I calculated X% = 2/96 = ~2.8%, which Project rounded to 2%, which is quite inaccurate. So this led to the question in my original post.

I *may* have taken the wrong route here though. Is there an easier/more correct way of allocating 2 hours to Resource A for this task?

I created the task as type Fixed Duration, if that matters.