Javascript 差异百分比数学

Question

我把自己搞糊涂了，连这个基本的数学都搞不懂，有空的话请帮帮我。

我如何在 Javascript 中执行此操作？

来源:http://www.calculatorsoup.com/calculators/algebra/percent-difference-calculator.php

( | V1 - V2 | / ((V1 + V2)/2) ) * 100 

= ( | 7606 - 6000 | / ((7606 + 6000)/2) ) * 100 
= ( | 1606 | / (13606/2) ) * 100 
= ( 1606 / 6803 ) * 100 
= 0.236072 * 100 

Answer 1

给你:

Working Example

var a = 10;
var b = 100;

function perDiff(a, b) {
  var avg = (a + b) / 2;
  var diff = a - b;
  return Math.abs(diff / avg) * 100;
}