计算两个数字之间的百分比变化

Question

Looking for some clarification on below code for calculating the percentage change between two different number of which the original could be a greater or smaller number. So will this code work for showing either a increase + or a decrease - change? Thanks.

$original= 100;
$current = 95;

$percentChange = (1 - $original / $current ) * 100;

Answer 1

Find difference and then count percentage like this

<?php
    $original= 100;
    $current = 115;
    $diff = $current - $original;
    $more_less = $diff > 0 ? "More" : "Less";
    $diff = abs($diff);
    $percentChange = ($diff/$original)*100;
    echo "$percentChange% $more_less agaist $original";
?>

Difference will be same for 110 and 90 against 100

Live demo : https://eval.in/872926