1. The problem statement, all variables and given/known data On a Temperature scale, the ice point is 25.6°I and the steam point is 155°I. If the temperature reads 66.6°I what is the equivalent in °C? 3. The attempt at a solution 25.6°I = 0°C 155°I = 100°C 1°I = 5/647 of the interval between boiling and freezing. 1C° = 647/500 I° 1I° = 500/647C° 66.6°I = 51.5°C I arrive at this answer but i'm not convinced i've done this correctly. When changing from faranheit to celsius for example, I have to subtract the offset from zero... So should my answer actually be 51.5 - 25.6 °C? I'd really appreciate some help, thanks!