To convert Fahrenheit to Celsius, we use the formula:

Celsius = (Fahrenheit - 32) × 5/9

So, 97.5 °F in Celsius is:

Celsius = (97.5 - 32) × 5/9

= (65.5) × 5/9

= 36.3888...

Therefore, 97.5 degrees Fahrenheit is approximately equal to 36.4 degrees Celsius.