-25.93% is the change from 856 to 634
Calculation steps:
[( 634 - 856 ) ÷ 856] x 100 = -25.93%
Formula
Percentage change = [(634 - 856) / 856] x 100
Subtract the new number by the original number
634 - 856 = -222
-222 ÷ 856 = -0.25934579439252337
-0.25934579439252337 x 100 = -25.93%