bootstrap row based on percentage code example
Example 1: bootstrap col-md-5 center
<div class="container">
<div class="row">
<div class="col-sm-5 mx-auto">
Centered
</div>
</div>
</div>
Example 2: bootstrap col size dinamically
<div class="row">
<div class="col">
1 of 2
</div>
<div class="col">
2 of 2
</div>
</div>