format value while php

Hi

I am putting together a table and I want to change the format in view of the query.

in this way the kilograms appear to me thus 701.9999999999999 Kg.

and I would like them to appear with the format 2, '.', ''

That would be 701.99 kg but I don't know how to do it. I leave the table example
echo "<table class='table'>";

echo "<tr>";

echo "<th>CANTIDAD DE PESADAS</th>";

echo "<th>TOTAL DE KILOGRAMOS</th>";

echo "</tr>";
while ($columna1 = mysqli_fetch_array( $resultado1 ))

{

echo "<tr>";

echo "<td><h4><b>".$columna1['total1']."&nbsp;</h4></td>";

$numero1=$columna1['total1'];
}

while ($columna = mysqli_fetch_array( $resultado ))

{
echo "<td><h4><b>".$columna['total']."&nbsp;Kg.</h4></td>";

$numero=$columna['total'];

echo "</tr>";

}
echo "</table>";