CPU Ready + Out-GridView in percentage?

Hi guys,

I'm using this to get a view of CPU Ready values and it's working fine:

Get-VM | SelectName, @{ N="Summation"; E={($_ | Get-Stat-stat cpu.ready.summation-maxsamples 1 -intervalsecs 30 | select-first1).Value} } | Sort-propertySummation-Descending | Out-GridView

sourced from here: Carter’s PowerCLI webinar brings us the Ready Time Monitor - Eric Sloof - NTPRO.NL

Is there a way to get the same info, with the Out-GridView but getting a "percentage" column instead of a summation one, or both ?

Thanks in advance,