What does nine fifths have to do with the Celsius and Fahrenheit scale?

Answer 1

Celsius and fahrenheita re f diffrent scales.

1 degree C =9/5 F. So 100 C change is 9/5 (100) = 180F change

But since the C scale is 0 at frex=zing water and F scale is 32 at freezing water, then

F = 9/5C + 32

Answer 2

Nine fifths is the conversion factor used to convert temperatures between the Celsius and Fahrenheit scales. To convert from Celsius to Fahrenheit, you multiply the Celsius temperature by 9/5 and then add 32. To convert from Fahrenheit to Celsius, you subtract 32 from the Fahrenheit temperature and then multiply by 5/9.