What formula is used to convert Fahrenheit to Celsius?

The correct formula for converting Fahrenheit to Celsius is C = 5/9 (F - 32). This formula is derived from the relationship between the two temperature scales, where you first subtract 32 from the Fahrenheit value to adjust for the difference in their starting points. Then, you multiply the result by 5/9 to account for the scale difference, effectively converting the measurement into Celsius.

The use of 5/9 in the formula reflects the fact that one degree Celsius is equivalent to a change of 1.8 degrees Fahrenheit. Therefore, by using this specific fraction, the conversion maintains the correct relationship between changes in temperature in both scales. This formula ensures accurate results when translating temperatures from Fahrenheit into Celsius.