What's the best way to strip the "0."XXX% off a number and make it a percentage? What happens if the number happens to be an int?
var number1 = 4.954848;
var number2 = 5.9797;
$(document).ready(function() {
final = number1/number2;
alert(final.toFixed(2) + "%");
});
This question is related to
javascript
math
A percentage is just:
(number_one / number_two) * 100
No need for anything fancy:
var number1 = 4.954848;
var number2 = 5.9797;
alert(Math.floor((number1 / number2) * 100)); //w00t!
@xtrem's answer is good, but I think the toFixed
and the makePercentage
are common use. Define two functions, and we can use that at everywhere.
const R = require('ramda')
const RA = require('ramda-adjunct')
const fix = R.invoker(1, 'toFixed')(2)
const makePercentage = R.when(
RA.isNotNil,
R.compose(R.flip(R.concat)('%'), fix, R.multiply(100)),
)
let a = 0.9988
let b = null
makePercentage(b) // -> null
makePercentage(a) // -> ?????99.88%?????
var percent = Math.floor(100 * number1 / number2 - 100) + ' %';
Well, if you have a number like 0.123456
that is the result of a division to give a percentage, multiply it by 100 and then either round it or use toFixed
like in your example.
Math.round(0.123456 * 100) //12
Here is a jQuery plugin to do that:
jQuery.extend({
percentage: function(a, b) {
return Math.round((a / b) * 100);
}
});
Usage:
alert($.percentage(6, 10));
Most answers suggest appending '%' at the end. I would rather prefer Intl.NumberFormat()
with { style: 'percent'}
var num = 25;_x000D_
_x000D_
var option = {_x000D_
style: 'percent'_x000D_
_x000D_
};_x000D_
var formatter = new Intl.NumberFormat("en-US", option);_x000D_
var percentFormat = formatter.format(num / 100);_x000D_
console.log(percentFormat);
_x000D_
The best solution, where en
is the English locale:
fraction.toLocaleString("en", {style: "percent"})
Numeral.js is a library I created that can can format numbers, currency, percentages and has support for localization.
numeral(0.7523).format('0%') // returns string "75%"
((portion/total) * 100).toFixed(2) + '%'
Source: Stackoverflow.com