explain hash from the given random hash

hash-explain.js

 const gameResult = (seed) => {
        const nBits = 52; // number of most significant bits to use
        // 1. r = 52 most significant bits
        seed = seed.slice(0, nBits / 4);
        const r = parseInt(seed, 16);
        // 2. X = r / 2^52
        let X = r / Math.pow(2, nBits); // uniformly distributed in [0; 1)
        // 3. X = 99 / (1-X)
        X = 99 / (1 - X);
        // 4. return max(trunc(X), 100)
        const result = Math.floor(X);
        return Math.max(1, result / 100);
      };

can you please reverse the calculations?