-22.95% is the change from 819 to 631
Calculation steps:
[( 631 - 819 ) ÷ 819] x 100 = -22.95%
Formula
Percentage change = [(631 - 819) / 819] x 100
Subtract the new number by the original number
631 - 819 = -188
-188 ÷ 819 = -0.22954822954822954
-0.22954822954822954 x 100 = -22.95%