How is it, where you are?

[Fykins]

Hmmm your right, funny, I was still able to convert 100 to 212 with that equation.

• How to approximate the conversion of Fahrenheit temperatures to Celsius with mental math.
  
• Subtract 32o to adjust for the offset in the Fahrenheit scale.
  
• Divide the Celsius temperature by 2 (multiply by 0.5).
  
• Take 1/10 of this number (0.5 * 1/10 = 0.05) and add it from the number above.
  
• Example: convert 98.6o F to Celsius.
  98.6 - 32 = 66.6
  66.6 * 1/2 = 33.3
  33.3 * 1/10 = 3.3
  33.3 + 3.3 = 36.6 which is an approximation of the Celsius temperature

http://www.321know.com/mea414x3.htm

W/e we are getting off topic so lets go on.