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adding values in a while loop


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I am trying to add values together in my while loop, so far I have:

$q->query($DB, $SQL);
$averageratings = $avrating['sum(rating)'] / $noofreviews;
$overallaverage = round($averageratings, 2) + round($averageratings, 2);
echo '<p>'.$avrating['rating_name'].': '.round($averageratings, 2).'</p>';
echo 'x'.$overallaverage;

$overallaverage += $overallaverage / 10;
echo 'The Average: '.$overallaverage;


from this, I get:

x7.34The Average: 8.074


the total shold be: 42.34

then dived by 10


should be 4.23

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