Quote:
Originally Posted by Alexander Turcic
Or if you are quick at math, subtract 32, then multiply by 5 and divide by 9. 
|
5/9 happens to be 0.55555, the observing person quickly sees how you can calculate that, it's ½ + ½ /10 + ½ /100
So for the 50°F example the result is
50 -32 = 18
18 / 2 = 9
9 + 0.9 + 0.09 ≈ 10°C