code: function (value, no_min) {
              var diapason = this.options.max - this.options.min,
                  one_percent = diapason / 100,
                  val, percent;
  
              if (!diapason) {
                  this.no_diapason = true;
                  return 0;
              }
  
              if (no_min) {
                  val = value;
              } else {
                  val = value - this.options.min;
              }
  
              percent = val / one_percent;
  
              return this.toFixed(percent);
          }
docs: Convert real value to percent
  
  @param value {Number} X in real
  @param no_min {boolean=} don't use min value
  @returns {Number} X in percent