{% load mul %}
{% load sub %}
{% load div %}

<div class="package_stat">
  <div class="packaged" style="width: {{ infos.n_packaged|mul:100.0|div:infos.n_versions }}%"></div>
  <div class="overlay" style="width: {{ infos.n_overlay|mul:100.0|div:infos.n_versions }}%"></div>
  <div class="upstream" style="width: {{ infos.n_versions|sub:infos.n_overlay|sub:infos.n_packaged|mul:100.0|div:infos.n_versions }}%"></div>
</div>