Dividere i en sql kommando

hej. jeg har flg. kode:
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mysql_connect("$host", "$loginname", "$password") or die (mysql_error());
mysql_select_db("$database") or die (mysql_error());

$henthits = mysql_query("SELECT SUM(hits) AS hits_ialt FROM downlist ");
$hentdown = mysql_query("SELECT SUM(hits) AS down_ialt FROM cshits") or die (mysql_error());
$hits = mysql_fetch_array($henthits / $hentdown);

echo$hits['hits_ialt'];
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Hvordan for jeg divideret $hentdown med £henthits??