-69.67% is the change from 844 to 256
Calculation steps:
[( 256 - 844 ) ÷ 844] x 100 = -69.67%
Formula
Percentage change = [(256 - 844) / 844] x 100
Subtract the new number by the original number
256 - 844 = -588
-588 ÷ 844 = -0.6966824644549763
-0.6966824644549763 x 100 = -69.67%