How can PHP developers efficiently calculate percentages of numbers within their scripts?

To efficiently calculate percentages of numbers in PHP, developers can use the following formula: (percentage / 100) * number. This formula converts the percentage to a decimal value and then multiplies it by the original number to get the result.

$percentage = 20; // Percentage to calculate
$number = 100; // Number to calculate percentage of

$result = ($percentage / 100) * $number;

echo "The result is: " . $result;