PHP中的百分比计算

本文介绍了PHP中的百分比计算的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我试图计算一个百分比以下(顺便说一句，我需要四舍五入，但是它一直显示100.如何使用以下示例在php中计算百分比:

I am trying to caluclate a percentage below (which by the way I need to be rounded up, but it keeps displaying 100. How can I calculate percentage in php using below's example:

    $totalmarks += (int)$questionData['questionmarks'];
    $studentmarks += (int)$questionData['studentmark'];
    $percentage = $studentmarks / $studentmarks * 100;

echo $percentage;

推荐答案

您的公式有误.您正在单独分隔studentmarks.它必须除以totalmarks.目前它就像说$percentage = 1/1 * 100;始终为100.

Your formula is wrong. You are dividing studentmarks by itself. It has to be divided by totalmarks. Currently its like saying $percentage = 1/1 * 100; which will always result in 100.

$percentage = ($studentmarks / $totalmarks) * 100;
$percentage = round($percentage,2);

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