FontAwesome has added half stars to their arsenal for future reference. Include a link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel=" stylesheet "> in the head> section of your page and the following will provide the basic structure.
    <span class="score">
<div class="score-wrap">
    <span class="stars-active" style="width:88%">
        <i class="fa fa-star" aria-hidden="true"></i>
        <i class="fa fa-star" aria-hidden="true"></i>
        <i class="fa fa-star" aria-hidden="true"></i>
        <i class="fa fa-star" aria-hidden="true"></i>
        <i class="fa fa-star-half" aria-hidden="true"></i>
    </span>
</span>
</div>
If you want the stars to be larger, change fa fa-star to fa fa-star 3x, where 3x represents the size, thus 3x, 4x, 5x, and so on. Use fa-star-o if you want a different style of star. If you want to alter the color, you can either edit it using CSS or add the colour to the class, for example, class="fa-star-o bg-light."