scaleBaseLineYScale = function scaleBaseLineYScale(y, i) {
            var yAxis = w.config.yaxis[w.globals.seriesYAxisReverseMap[i]];
            var sign = y < 0 ? -1 : 1;
            y = Math.abs(y);
            if (yAxis.logarithmic) {
              y = _this2.getBaseLog(yAxis.logBase, y);
            }
            return -sign * y / yRatio[i];
          }
@memberof CoreUtils
returns the percentage value of all individual values which can be used in a 100% stacked series
Eg. w.globals.series = [[32, 33, 43, 12], [2, 3, 5, 1]]
 @return [[94.11, 91.66, 89.58, 92.30], [5.88, 8.33, 10.41, 7.7]]