Question

how to change kelvin into celsius scale

Answer 1

by using this formula you can do this..
$c \div 5 =( f - 32) \div 9 = k - 273 \div 5$

Answer 2

To change kelvin into we subtract 273 from the given kelvin value .
For example :
300k change into celsius
300 - 273 = 7
That's 7 degreeC