PHP

php calculate percentage

$percentage = 50;
$totalWidth = 350;

$new_width = ($percentage / 100) * $totalWidth;

increase the number in php by a certain percentage

$price = $price + ($percentage / 100 ) * $price

php - How do I calculate the percentage of a number?

//ENTER  PERCENT AND AMOUNT 
//IT WILL RETURN OUTPUT
//INTAKE: 2% OF 10
//OUTPUT : 0.2
function calc_percent($percent, $amt) {
  return  $output = ($per/100 * $amt);
}