Convert 70 degrees Fahrenheit to Celsius using the formula C = (F - 32) × 5/9.

To convert 70 degrees Fahrenheit to Celsius using the formula ( C = (F - 32) \times \frac{5}{9} ), first substitute 70 for ( F ).

Start the calculation by subtracting 32 from 70:

[

70 - 32 = 38

]

Next, multiply this result by ( \frac{5}{9} ):

[

C = 38 \times \frac{5}{9}

]

To perform the multiplication, first calculate ( 38 \times 5 ):

[

38 \times 5 = 190

]

Now, divide 190 by 9 to find the value of ( C ):

[

C = \frac{190}{9} \approx 21.11

]

This yields approximately ( 21.11 ) degrees Celsius. The calculation demonstrates the proper application of the conversion formula and confirms that the correct answer is approximately 21.11°C, aligning with the choice provided as the correct answer.