Bootstrap progress bar

Anyone know how to set the progress bar value in the controller and pass
it to
the view?
I tried the following:

Controller/show: @progress_bar_num = "25%"

View/show:
<div class="progress">
  <div class="progress-bar" role="progressbar" aria-valuenow=<%=
@p_bar_number %> aria-valuemin="0" aria-valuemax="100" style="width: <%=
@p_bar_num%>;">
          <%=@p_bar_num%>
  </div>
</div>

Not even close...

Thanks!

Dave

OK, got it. Have to set the width of .bar through javascript / jQuery.