Using below shortcode, you can set the width of content.
30% Width
<div class="width30">
your content here...
</div>
40% Width
<div class="width40">
your content here...
</div>
50% Width
<div class="width50">
your content here...
</div>
60% Width
<div class="width60">
your content here...
</div>
70% Width
<div class="width70">
your content here...
</div>
80% Width
<div class="width80">
your content here...
</div>
90% Width
<div class="width90">
your content here...
</div>