<!DOCTYPE html>
<html>
<head>
<style>
table {
border-collapse: separate;
width: 100%;
border: 1px solid black;
}
td {
border: 1px solid black;
}
table.ex1 {
table-layout: auto;
}
table.ex2 {
table-layout: fixed;
}
</style>
</head>
<body>
<p>table-layout: auto:</p>
<table class="ex1">
<tr>
<td width="5%">1000000000000000000000000000</td>
<td width="95%">10000000</td>
</tr>
</table>
<p>table-layout: fixed:</p>
<table class="ex2">
<tr>
<td width="5%">1000000000000000000000000000</td>
<td width="95%">10000000</td>
</tr>
</table>
</body>
</html>