-72.74% is the change from 939 to 256
Calculation steps:
[( 256 - 939 ) ÷ 939] x 100 = -72.74%
Formula
Percentage change = [(256 - 939) / 939] x 100
Subtract the new number by the original number
256 - 939 = -683
-683 ÷ 939 = -0.7273695420660277
-0.7273695420660277 x 100 = -72.74%