text: /**
   * convert temperature in Rankine to Kelvin to 6 significant figures
   * @param {number} rankine - temperature expressed in Rankine
   * @return {number} a temperature expressed in Kelvins
   */
  
  function rankineToKelvin(rankine) {
    if (typeof rankine === "number" && rankine >= 0) {
      return Number((rankine * 5 / 9).toPrecision(6));
    } else {
      throw("Invalid Type");
    }
  }
  
  module.exports = rankineToKelvin;
  