-21.85% is the change from 856 to 669
Calculation steps:
[( 669 - 856 ) ÷ 856] x 100 = -21.85%
Formula
Percentage change = [(669 - 856) / 856] x 100
Subtract the new number by the original number
669 - 856 = -187
-187 ÷ 856 = -0.21845794392523366
-0.21845794392523366 x 100 = -21.85%