What is the formula for converting Fahrenheit to Celsius?

• A. Add 32 and multiply by 1.8
• B. Multiply by 1.8 and subtract 32
• C. Subtract 273 and divide by 2
• D. Subtract 32 and divide by 1.8

Answer: (D)

The relationship between Fahrenheit and Celsius combines a fixed offset with a change of scale. The freezing point of water is 32°F, and a one-degree change in Celsius corresponds to a 1.8-degree change in Fahrenheit. To convert Fahrenheit to Celsius, you first remove the 32-degree offset, then scale by dividing by 1.8. This gives the formula: (F − 32) ÷ 1.8. That matches the established conversion from Fahrenheit to Celsius.

The other approaches mix up the order or the sign, such as adding 32 or subtracting 32 in the wrong context, or using an unrelated offset like subtracting 273 and halving, which does not reflect the Fahrenheit–Celsius relationship.