<!DOCTYPE html>
<html>
<head>
<style>
table, th, td {
border: 1px solid black;
}
table.center {
margin-left: auto;
margin-right: auto;
}
</style>
</head>
<body>
<h1>Center a Table</h1>
<p>To center a table, set left and right margin to auto:</p>
<table class="center">
<tr>
<th>Month</th>
<th>Savings</th>
</tr>
<tr>
<td>January</td>
<td>$100</td>
</tr>
<tr>
<td>February</td>
<td>$80</td>
</tr>
</table>
</body>
</html>