Are there any common pitfalls to avoid when working with percentages in PHP?

One common pitfall to avoid when working with percentages in PHP is forgetting to convert the percentage value to a decimal before performing calculations. To solve this issue, always divide the percentage value by 100 before using it in mathematical operations.

// Incorrect way of calculating percentage
$total = 100;
$percentage = 20;
$result = $total * $percentage; // This will give an incorrect result

// Correct way of calculating percentage
$total = 100;
$percentage = 20;
$decimalPercentage = $percentage / 100;
$result = $total * $decimalPercentage; // This will give the correct result