title: Showing percentage without decimal using billboardjs on pie chart
body: <p>I am using billboardjs to draw a pie chart .
  When pie chart displayed it's shows percentage as <code>60.0%</code> and  <code>40.0%</code> like that.
  I want to display it as <code>60%</code> and <code>40%</code> . I don't want to display decimal part .
  Any help .</p>