-85.27% is the change from 679 to 100
Calculation steps:
[( 100 - 679 ) ÷ 679] x 100 = -85.27%
Formula
Percentage change = [(100 - 679) / 679] x 100
Subtract the new number by the original number
100 - 679 = -579
-579 ÷ 679 = -0.8527245949926362
-0.8527245949926362 x 100 = -85.27%