-26.37% is the change from 857 to 631
Calculation steps:
[( 631 - 857 ) ÷ 857] x 100 = -26.37%
Formula
Percentage change = [(631 - 857) / 857] x 100
Subtract the new number by the original number
631 - 857 = -226
-226 ÷ 857 = -0.2637106184364061
-0.2637106184364061 x 100 = -26.37%