You decide to establish a new temperature scale on which

You decide to establish a new temperature scale on which

Question
1.You decide to establish a new temperature scale on which the melting point of ammonia (-77.75 C) is 0 IN THE NEW SCALE, and the boiling point of ammonia (-33.35 C) is 300 IN THE NEW SCALE.

What would be the temperature of absolute zero in THE NEW SCALE