To convert $187^\circ F$ to Celsius using the formula:

$C = \frac{5}{9} \times (F - 32)$

Substitute $F = 187^\circ F$ into the formula:

$C = \frac{5}{9} \times (187 - 32)$

First, calculate $187 - 32$:

$187 - 32 = 155$

Now, multiply $155$ by $\frac{5}{9}$:

$C = \frac{5}{9} \times 155 = \frac{775}{9} \approx 86.11^\circ C$

So, $187^\circ F$ is approximately $86.11^\circ C$.

Would you like more details or have any questions?

Here are some related questions:

1. What is the formula for converting Celsius back to Fahrenheit?
2. How would you convert temperatures in Kelvin to Celsius?
3. Why does water boil at different temperatures at different altitudes?
4. What are some examples of where temperature conversion is used in daily life?
5. How does absolute zero relate to Fahrenheit and Celsius?

Tip: Always subtract 32 from the Fahrenheit temperature before multiplying by $\frac{5}{9}$ for accurate conversion.