-6.23% is the change from 273 to 256
Calculation steps:
[( 256 - 273 ) ÷ 273] x 100 = -6.23%
Formula
Percentage change = [(256 - 273) / 273] x 100
Subtract the new number by the original number
256 - 273 = -17
-17 ÷ 273 = -0.06227106227106227
-0.06227106227106227 x 100 = -6.23%