-25.9% is the change from 857 to 635
Calculation steps:
[( 635 - 857 ) ÷ 857] x 100 = -25.9%
Formula
Percentage change = [(635 - 857) / 857] x 100
Subtract the new number by the original number
635 - 857 = -222
-222 ÷ 857 = -0.2590431738623104
-0.2590431738623104 x 100 = -25.9%