To convert Fahrenheit to Celsius using the formula:
\[ C = \frac{5}{9} \times (F - 32) \]
we can substitute \( F \) with 86°F:
\[ C = \frac{5}{9} \times (86 - 32) \]
Now, calculate \( 86 - 32 \):
\[ 86 - 32 = 54 \]
Next, plug this value back into the equation:
\[ C = \frac{5}{9} \times 54 \]
Now, multiply:
\[ C = \frac{5 \times 54}{9} \]
Calculate \( 5 \times 54 = 270 \):
\[ C = \frac{270}{9} \]
Now divide:
\[ C = 30 \]
Therefore, \( 86°F \) is equal to \( 30°C \).