21 fahrenheit to celsius

Step 1: Identify the conversion factor

The conversion factor from fahrenheit to celsius is:

1 fahrenheit = -0.291 celsius

Step 2: Set up the calculation

To convert 21 fahrenheit to celsius, multiply 21 by the conversion factor -0.291:

21×-0.291

Step 3: Calculate

21×-0.291=-6.111

Step 4: Round the result

The result is approximately: -6.11 celsius

Final Answer:

21 fahrenheit is approximately -6.11 celsius.