Score of Sunny is __ % of that of Victor ?

Four friends Manthon, Rahul, Sunny & Victor competed in a contest where maximum possible score was 300All friends scored more than 60 and none scored fractional scores;
I – Manthon scored less than 200 and his score was a perfect square but 70 less than double of Victor’s scores;
II – Rahul & Sunny together scored exactly 270, and score of one of the two was one less than a perfect square (like X²-1 shape);
III – The score of neither Rahul nor Victor was a multiple of 11; but score of one of them was a multiple of 17.