langPercentFromDonutVerticalLayoutSvg = (
  partLength,
  totalCircleLength,
) => {
  return (partLength / totalCircleLength) * 100;
}
Calculate language percentage for donut vertical chart SVG.

@param {number} partLength Length of current chart part..
@param {number} totalCircleLength Total length of circle.
@returns {number} Chart part percentage.