Analyze Shared Variable?

I have a subreport that is passing a number to the main report for each sample. (In the red box below)

Now I want to create 2 formulas in my main report  in my footer to do:
1. Tells me the number of samples with a value >10
2. A percentage of samples with less than 10.

How do I do this and is it possible to evaluate shared variable values?

Subreport formula:
WhilePrintingRecords;
Shared numbervar Turnaround:={@TurnaroundTime}

Main report formula:
Shared numbervar Turnaround;
Turnaround