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Hi All here is an easy way to convert Centigrade (C)to Fahrenheit (F) in your head quickly and it's very accurate..

Take the C and multiply it by 2, then minus 10% of that number, then add 32 on and that gives you F.

Example:

25C x 2 = 50. Minus 10% which is 5 = 45. Add 45 + 32 = 77F


30C X 2 = 60. Minus 10% which is 6 = 54. Add 54 + 32 + 86F

Roger Lee
LSRM-A & Rotax Instructor & Rotax IRC
Tucson, AZ Ryan Airfield (KRYN)
520-574-1080 Home (TRY HOME FIRST)
520-349-7056 Cell
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