Help with the Faherenheit to celsius button in the weather app

Hello campers!,

I am struck since a month in the weather app task, I cant do that the temperature change to farenheit to celsius when I click a button (I would like made that whent I click the F in the temperature but is optional).

I have two functions one change to kelvin to farenheit and other change kelvin to celsius, so I had tried used this conditional:

//$("#change").click(function () {
  //if (weather.temp == K2F) {return K2C }else{ return K2C }
//});

But dont work I think that the problem is that the function are not calling weather.temp and I dont know why. How I could solve this?

This is my codepen

Thank you