-98.82% is the change from 680 to 8
Calculation steps:
[( 8 - 680 ) ÷ 680] x 100 = -98.82%
Formula
Percentage change = [(8 - 680) / 680] x 100
Subtract the new number by the original number
8 - 680 = -672
-672 ÷ 680 = -0.9882352941176471
-0.9882352941176471 x 100 = -98.82%