Formula:
Celsius = (Fahrenheit - 32) * 5/9
Calculation:
1. Subtract 32 from the Fahrenheit temperature: 98.4 - 32 = 66.4
2. Multiply the result by 5/9: 66.4 * 5/9 = 36.89
Therefore, 98.4 degrees Fahrenheit is equal to 36.89 degrees Celsius.