-80.35% is the change from 631 to 124
Calculation steps:
[( 124 - 631 ) ÷ 631] x 100 = -80.35%
Formula
Percentage change = [(124 - 631) / 631] x 100
Subtract the new number by the original number
124 - 631 = -507
-507 ÷ 631 = -0.803486529318542
-0.803486529318542 x 100 = -80.35%