In this tutorial I will teach you how to calculate percentage increase and percentage decreased in PHP.
This is the most common and used in many areas such as calculating a sales price.
$price = 50;// Original cost of item $sale_price = 30;// New sale price // We determine the sale difference $price_diff = $price - $sale_price; // Next we divide the price_diff by the original price $percent_sale = $price_diff / $price; // Finally we multiply by 100 to get the percentage and format. $percent_sale = number_format( $percent_sale * 100, 0 ) . '%';
Calculating percentage increase in PHP is similar to the decrease method except in this case we subtract from the new total.
$hours_last_week = 40;// Hours worked last week $hours_this_week = 50;// Hours worked this week // Get difference in hours worked $hours_diff = $hours_this_week - $hours_last_week; // Next we divide the hours_diff by the original hours. $hours_diff = $hours_diff / $hours_last_week; // Finally we multiply by 100 to get the percentage and format. $hours_diff = number_format( $hours_diff * 100, 0 ) . '%';
Thats it. Easy examples how to calculate percentage in PHP.