-20.83% is the change from 797 to 631
Calculation steps:
[( 631 - 797 ) ÷ 797] x 100 = -20.83%
Formula
Percentage change = [(631 - 797) / 797] x 100
Subtract the new number by the original number
631 - 797 = -166
-166 ÷ 797 = -0.20828105395232122
-0.20828105395232122 x 100 = -20.83%