-88.32% is the change from 685 to 80
Calculation steps:
[( 80 - 685 ) ÷ 685] x 100 = -88.32%
Formula
Percentage change = [(80 - 685) / 685] x 100
Subtract the new number by the original number
80 - 685 = -605
-605 ÷ 685 = -0.8832116788321168
-0.8832116788321168 x 100 = -88.32%