-82.04% is the change from 685 to 123
Calculation steps:
[( 123 - 685 ) ÷ 685] x 100 = -82.04%
Formula
Percentage change = [(123 - 685) / 685] x 100
Subtract the new number by the original number
123 - 685 = -562
-562 ÷ 685 = -0.8204379562043795
-0.8204379562043795 x 100 = -82.04%