1. Add 40 2, Multiply by 5/9 if Fahrenheith was FIRST, otherwise multiply ny 9/5 3. Subtract 40 212°F 1. Add 40 ---> 212+40 = 252 2. Multiply by 5/9 since Fahrenheith was FIRST. ---> 252×5/9 = 140 3. Subtract 40 ---> 240-40 = 100 Answer: 100°C Edwin