/**
 * Find the percentage of `$num` in the range of `$start` and `$end`.
 *
 * @param  {number} $num
 * @param  {number} $start
 * @param  {number} $end
 * @return  Percentage value in decimal format.
 */
export declare function PercentageInRange($num: number, $start: number, $end: number): number;