-90.34% is the change from 683 to 66
Calculation steps:
[( 66 - 683 ) ÷ 683] x 100 = -90.34%
Formula
Percentage change = [(66 - 683) / 683] x 100
Subtract the new number by the original number
66 - 683 = -617
-617 ÷ 683 = -0.9033674963396779
-0.9033674963396779 x 100 = -90.34%