PHP percentage

$uitgaanQuery = $core->mysql->query("SELECT
											id,
											naam,
											type,
											beschrijving,
											foto,
											website
										FROM
											bedrijven
										WHERE
											activatie = 1
										ORDER BY
											naam
										DESC LIMIT
											".(($huidige * $per_pagina) - $per_pagina).", ".$per_pagina);




	if($core->mysql->num_rows($uitgaanQuery) >= 1)
	{
		$i = 0;
		$per = 0;
		echo '<div style="text-align: center; padding-top: 5px; padding-bottom: 5px;">'.$str.'</div>';
		
		while($uitgaanFetch = $core->mysql->fetch($uitgaanQuery))
		{
			$percentageQuery = $core->mysql->query("SELECT
														*
													FROM
														bedrijf_recensie
													WHERE
														bedrijf_id = '".$uitgaanFetch['id']."'");
			while($percentageFetch = $core->mysql->fetch($percentageQuery))
			{
				$percentage = $percentageFetch['service'] + $percentageFetch['prijs'] + $percentageFetch['sfeer'] / 3;
				$per = number_format($percentage, 1, ',', ' ');
			}
			
		
			
			$bg = ($i