you can also show the percentage by adding a attribute data-percentage="60%" on .n-progress-bar class.
<h6>default</h6><div class="n-progress"><div class="n-progress-bar" data-percentage="100%" style="width: 100%" /></div><h6>success</h6><div class="n-progress"><div class="n-progress-bar n-success" data-percentage="60%" style="width: 60%" /></div><h6>warning</h6><div class="n-progress"><div class="n-progress-bar n-warning" data-percentage="30%" style="width: 30%" /></div><h6>danger</h6><div class="n-progress"><div class="n-progress-bar n-danger" data-percentage="90%" style="width: 90%" /></div>