<?php

$Numbers[1] = 500;
$Numbers[2] = 430;
$Numbers[3] = 150;
$Numbers[4] = 30; 

foreach($Numbers as $Number) {
    echo $Number, ' is ', number_format($Number / array_sum($Numbers) * 100, 2), '% of ', array_sum($Numbers), PHP_EOL;
}
echo PHP_EOL;