-89.64% is the change from 685 to 71
Calculation steps:
[( 71 - 685 ) ÷ 685] x 100 = -89.64%
Formula
Percentage change = [(71 - 685) / 685] x 100
Subtract the new number by the original number
71 - 685 = -614
-614 ÷ 685 = -0.8963503649635036
-0.8963503649635036 x 100 = -89.64%