JSFiddle - React, Tailwind, and code Playground

HTML

<h2>Right Tooltip w/ Left Arrow</h2>

<div class="tooltip">Hover over me
  <span class="tooltiptext" style="width:100%">
        
        
        <table style="width:100%">
        <caption>Monthly savings</caption>
            <tr>
                <th>Month</th>
                <th>Savings</th>
            </tr>
            <tr>
                <td>January</td>
                <td>$100</td>
           </tr>
           <tr>
               <td>February</td>
               <td>$50</td>
           </tr>
        </table>
        
        
        
  </span>
</div>

CSS

.tooltip {
    position: relative;
    display: inline-block;
    border-bottom: 1px dotted black;
}

.tooltip .tooltiptext {
    visibility: hidden;
    width: 120px;
    background-color: black;
    color: #fff;
    text-align: center;
    border-radius: 6px;
    padding: 5px 0;
    position: absolute;
    z-index: 1;
    top: -5px;
    left: 110%;
}

.tooltip .tooltiptext::after {
    content: "";
    position: absolute;
    top: 50%;
    right: 100%;
    margin-top: -5px;
    border-width: 5px;
    border-style: solid;
    border-color: transparent black transparent transparent;
}
.tooltip:hover .tooltiptext {
    visibility: visible;
}

table, th, td {
    border: 1px solid white;
    border-collapse: collapse;
}
th, td {
    padding: 5px;
    text-align: left;
}