There seems to be a misunderstanding. "Centigrade" is an older term for Celsius.

Here's how to convert 98.6 degrees Celsius to Fahrenheit:

* Formula: F = (C × 9/5) + 32

* Plug in the value: F = (98.6 × 9/5) + 32

* Calculate: F = 173.48 + 32 = 205.48

Therefore, 98.6 degrees Celsius is equal to 205.48 degrees Fahrenheit.