-69.23% is the change from 832 to 256
Calculation steps:
[( 256 - 832 ) ÷ 832] x 100 = -69.23%
Formula
Percentage change = [(256 - 832) / 832] x 100
Subtract the new number by the original number
256 - 832 = -576
-576 ÷ 832 = -0.6923076923076923
-0.6923076923076923 x 100 = -69.23%