-71.93% is the change from 912 to 256
Calculation steps:
[( 256 - 912 ) ÷ 912] x 100 = -71.93%
Formula
Percentage change = [(256 - 912) / 912] x 100
Subtract the new number by the original number
256 - 912 = -656
-656 ÷ 912 = -0.7192982456140351
-0.7192982456140351 x 100 = -71.93%