-31.78% is the change from 856 to 584
Calculation steps:
[( 584 - 856 ) ÷ 856] x 100 = -31.78%
Formula
Percentage change = [(584 - 856) / 856] x 100
Subtract the new number by the original number
584 - 856 = -272
-272 ÷ 856 = -0.3177570093457944
-0.3177570093457944 x 100 = -31.78%