It is possible to do that, but you will need a custom stat.
Probably the simplest way is to make a copy of the stat that you're interested in, and change the format to display the times and opportunities as well as the percentage.
The
Custom Stats Guide has an overview of custom stats in PT4, and the
Tutorial: Custom Reports and Statistics goes into much more detail. The latter was written for PT3, but the same principals apply in PT4.
Search for "The format function" in
this post for how to format expressions like that.
For "3Bet Preflop" for example, the format expression could look like:
format( '{1}% ({2}/{3})', ((cnt_p_3bet / cnt_p_3bet_opp) * 100, format_number(cnt_p_3bet,0,false,false), format_number((cnt_p_3bet_opp,0,false,false) )
..which would display as:
60% (12/20)
Alternatively, you could make a new stat which just displays the value of cnt_p_3bet_opp, but the above shows you the stat value as well as both the times and opportunities.