-27.22% is the change from 856 to 623
Calculation steps:
[( 623 - 856 ) ÷ 856] x 100 = -27.22%
Formula
Percentage change = [(623 - 856) / 856] x 100
Subtract the new number by the original number
623 - 856 = -233
-233 ÷ 856 = -0.272196261682243
-0.272196261682243 x 100 = -27.22%