To convert Fahrenheit to Celsius:
Subtract 32. Then multiply by 5/9.
Example: Convert 140°F to Celsius.
140 − 32 = 108
108 × 5/9 = 60°C
To convert Celsius to Fahrenheit:
Multiply by 9/5. Then add 32.
Example: Convert 150°C to Fahrenheit.
150 × 9/5 = 270
270 + 32 = 302°F
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