Hi, i am a newbie - How to calculate average " yes" in a yes/no column?

[GW2]

What is an expression i need to use to find the average " yes" in a yes/no column?

[jwjackso]

If there values of [yes/no] are only 'yes' and 'no'

=Count({<[yes/no]={'yes'}>}[yes/no])/Count({<[yes/no]={'yes','no'}>}[yes/no])

or 

=Count({<[yes/no]={'yes'}>}[yes/no])/Count([yes/no])

[GW2]

Thanks,  But where would i insert the column name?

[jwjackso · Accepted solution]

=Count({<COLUMN_NAME_GOES_HERE={'yes'}>}COLUMN_NAME_GOES_HERE)/Count({<COLUMN_NAME_GOES_HERE={'yes','no'}>}COLUMN_NAME_GOES_HERE)