Step-by-step explanation:
oh, come on ! your teacher gave you all information and actual instruction in the description :
C = K - 273
that means to get a temperature in C (Celsius or Centigrade) from a Kelvin temperature, you need to subtract 273 from the Kelvin temperature.
that's it.
so, in our case, we have 100.6° Kelvin.
C° = 100.6 - 273 = -172.4° C
so, what was your problem here ? what "steps" do you need ?
is it that the subtraction from positive numbers into negative numbers is not clear ?
if that is the case, let's split our given problem here into the micro-steps :
100.6 - 273
first step : subtract 100.6 from 273. to do that we subtract first 100 from 273 (273 - 100 = 173). and then we subtract from that result 0.6 (173 - 0.6 = 172.4).
we do that to bring the first number in the subtraction down to 0, as the rest is then really easy.
what we formally did :
(100.6 - 100.6) - (273 - 100.6) =
= 100.6 - 100.6 - 273 + 100.6
so, now you see it, right ? with that trick we subtracted from AND added to the expression 100.6 at the same time, so that in total the expression did not change at all. but it leveled the numbers down, so that the first number is now 0.
second step : now, we are standing with the task to subtract these remaining 172.4 from 0.
0 - 172.4 = -172.4
just like that. that's it. that's the whole secret.