JSFiddle - React, Tailwind, and code Playground

HTML

<div>
<h1>0.119</h1>
<h2></h2>
<h3></h3>
</div>

<div>
<h1>55</h1>
<h2></h2>
<h3></h3>
</div>

<div>
<h1>0.9</h1>
<h2></h2>
<h3></h3>
</div>

<div>
<h1>57</h1>
<h2></h2>
<h3></h3>
</div>

CSS

div:nth-of-type(odd) {background:#eee}

JavaScript

$('div').each(function() {
    var self = $(this),
       	num = self.find('h1').text()
        prec = num.length;

    // adjust for decimal point
    if (num.indexOf('.') != -1)
        prec--;

    // adjust for leading zero
    if (num < 1)
        prec--;
    
    num /= 100;
	self.find('h2').append(num.toPrecision(prec));
});