Afrund procent så det går op i 100%

<?php
$tal1 = 34;
$tal2 = 21;
$tal1pct = round(100 * $tal1 / ($tal1 + $tal2));
$tal2pct = round(100 * $tal2 / ($tal1 + $tal2));
echo "$tal1pct $tal2pct\r\n";
$tal1pct = round(100 * $tal1 / ($tal1 + $tal2), 1);
$tal2pct = round(100 * $tal2 / ($tal1 + $tal2), 1);
echo "$tal1pct $tal2pct\r\n";
?>

<?php
$tal1 = 455;
$tal2 = 545;
$tal1pct = round(100 * $tal1 / ($tal1 + $tal2));
$tal2pct = round(100 * $tal2 / ($tal1 + $tal2));
echo "$tal1pct $tal2pct\r\n";
?>

<?php
$tal1 = 455;
$tal2 = 545;
$tal1pct = round(100 * $tal1 / ($tal1 + $tal2));
$tal2pct = 100 - $tal1pct;
echo "$tal1pct $tal2pct\r\n";
?>

<?php
function pctify($a, $dig = 0) {
    $total = array_sum($a);
    $scale = pow(10.0, $dig);
    $unadj = array_map(function($v) use($total) { return 100.0 * $v / $total; }, $a);
    $trunc = array_map(function($v) use($scale, $dig) { return floor($scale * $v) / $scale; }, $unadj);
    $diff = array();
    for($i = 0; $i < count($a); $i++) $diff[$i] = array('ix' => $i, 'diff' => $unadj[$i] - $trunc[$i]);
    usort($diff, function($v1,$v2) { return $v2['diff'] > $v1['diff'] ? 1 : -1; });
    $adj = $trunc;
    $nadj = round($scale * (100.0 - array_sum($trunc)), 0);
    for($i = 0; $i < $nadj; $i++) $adj[$diff[$i]['ix']] += 1 / $scale;
    return $adj;
}


$a = array(333, 334, 333);
$pcta = pctify($a, 0);
echo implode(' ', $pcta) . "\r\n";
$pcta = pctify($a, 1);
echo implode(' ', $pcta) . "\r\n";
$b = array(4555, 5445);
$pctb = pctify($b, 1);
echo implode(' ', $pctb) . "\r\n";
$pctb = pctify($b, 2);
echo implode(' ', $pctb) . "\r\n";
$c = array(33333, 33334, 33333);
$pctc = pctify($c, 1);
echo implode(' ', $pctc) . "\r\n";
$pctc = pctify($c, 2);
echo implode(' ', $pctc) . "\r\n";
?>