JavaScript差异百分比数学

Question

我把自己搞糊涂了，甚至不能解决这个基本的数学问题，请帮帮我，如果你有时间的话。

在Javascript中应该如何做？

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 

- Alexander C.

Answer 1

Here you go:

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;
}

- omarjmh

Answer 2

看起来JordanHendrix比我先完成了它。

function diffPercent(v1, v2) {
  return (Math.abs(v1- v2) / ((v1 + v2) / 2)) * 100;
}

console.log(diffPercent(7606, 6000))
// => 23.607232103483756

或者

function diffPercent(v1, v2) {
  var diff = Math.abs(v1 - v2);
  var sum = v1 + v2;
  var pc = diff / (sum / 2);
  return pc * 100;
}

console.log(diffPercent(7606, 6000))
// => 23.607232103483756

- user2251284