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<?php $percent = [20.88, 14.93, 14.14, 13.29, 5.06, 4.43, 4.24, 4.22, 2.57, 2.51, 2.38, 2.18, 1.94, 1.80, 1.34, 1.21, 0.81, 0.63, 0.50, 0.48, 0.30, 0.16]; $limit = 6; if ($limit * count($percent) < 100) die("Not possible"); $limited = array_map(function($value) use ($limit) { return min($value, $limit); }, $percent); while (($remain = 100 - array_sum($limited)) > 0) { $filtered = array_filter($limited, function($v) use ($limit) { return $v < $limit; }); $evenly = $remain / count($filtered); $limited = array_map(function($value) use ($evenly, $limit) { return min($value + $evenly, $limit); }, $limited); } print_r($limited); print_r(array_sum($limited));