What is 2-8 degrees Celsius in Fahrenheit?

The conversion from deg C to Deg F is 9/5(degC) + 32. I don't understand the question as posed.

2 C = 36,5 F

8 C = 46,4 F

2 C - 8 C is -6 C = 21,2 F

(if it was two degrees Celsius yesterday and the temperature dropped eight degrees overnight it would now be minus six degrees Celsius or about twenty one degrees Fahrenheit)