-69.01% is the change from 826 to 256
Calculation steps:
[( 256 - 826 ) ÷ 826] x 100 = -69.01%
Formula
Percentage change = [(256 - 826) / 826] x 100
Subtract the new number by the original number
256 - 826 = -570
-570 ÷ 826 = -0.6900726392251816
-0.6900726392251816 x 100 = -69.01%