-71.68% is the change from 904 to 256
Calculation steps:
[( 256 - 904 ) ÷ 904] x 100 = -71.68%
Formula
Percentage change = [(256 - 904) / 904] x 100
Subtract the new number by the original number
256 - 904 = -648
-648 ÷ 904 = -0.7168141592920354
-0.7168141592920354 x 100 = -71.68%