Experiment Split

controllers.application.js

import Ember from 'ember';
import _math from 'lodash/math';

const { computed, get } = Ember; 

export default Ember.Controller.extend({
  ratios: computed.mapBy('experiments', 'ratio'),
  totalofExperimentRatios: computed.sum('ratios'),
  controlRatio: computed('totalofExperimentRatios', function () {
		return this._controlRatio();
  }),

  _controlRatio() {
    let total = get(this, 'totalofExperimentRatios');
    let ratio = 100 - total;
    if (ratio < 1) {
      return 0;
    }
    if (!isNaN(ratio)) {
      if (!Number.isInteger(ratio)) {
        console.log(ratio);
        return _math.round((ratio), 2).toFixed(1);
      }
      return ratio;
    }
  },
  
  experiments: [{
  	name: 'A',
    ratio: 33.33
  }, {
  	name: 'B',
    ratio: 33.33
  }]
  
});

templates.application.hbs

<div>control {{controlRatio}}</div>

<div>total {{totalofExperimentRatios}}</div>

{{#each experiments as |experiment|}}
	<div>
  	{{experiment.name}} {{experiment.ratio}}
  </div>
{{/each}}

twiddle.json

{
  "version": "0.13.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.16.2",
    "ember-template-compiler": "2.16.2",
    "ember-testing": "2.16.2"
  },
  "addons": {
    "ember-data": "2.16.3",
    "ember-lodash": "4.17.6"
  }
}