Why in 100% 101%?

Question

Bootstrap

With 320px phone emulation - everything is fine

Without emulation (320px, 480px) - cant

<div class="progress">
    <div class="bg-success" style="width: 10%"></div>
    <div class="bg-danger" style="width: 90%"></div>
</div>

<div class="progress">
    <div class="bg-success" style="width: 11%"></div>
    <div class="bg-danger" style="width: 90%"></div>
</div>

What kind of game is on the right on the first screen: how to remove it?

Answer 1

<div class="progress bg-danger">
    <div class="bg-success" style="width: 10%"></div>
</div>