1. The problem is to convert 84 degrees Fahrenheit (°F) to degrees Celsius (°C). 2. The formula to convert Fahrenheit to Celsius is: $$ C = \frac{5}{9} (F - 32) $$ where $F$ is the temperature in Fahrenheit and $C$ is the temperature in Celsius. 3. Substitute $F = 84$ into the formula: $$ C = \frac{5}{9} (84 - 32) $$ 4. Calculate the difference inside the parentheses: $$ 84 - 32 = 52 $$ 5. Now the expression is: $$ C = \frac{5}{9} \times 52 $$ 6. Multiply numerator and denominator: $$ C = \frac{5 \times 52}{9} = \frac{260}{9} $$ 7. Simplify the fraction by dividing numerator and denominator by their greatest common divisor (which is 1, so fraction stays the same): $$ C = \frac{260}{9} $$ 8. Convert the fraction to a decimal: $$ C \approx 28.89 $$ 9. Therefore, 84°F is approximately 28.89°C.