proportion/index.js

Simple package for calculating proportion

module.exports = {
   data: {},

   of: function(num) {
      this.data.for = parseFloat(num);

      return this;
   },

   if: function(num) {
      this.data.if = parseFloat(num);

      return this;
   },

   equals: function(num) {
      this.data.equals = parseFloat(num);

      var result = this.data.for * this.data.equals / this.data.if;

      this.data = {};

      return result;
   }
}