-76.82% is the change from 686 to 159
Calculation steps:
[( 159 - 686 ) ÷ 686] x 100 = -76.82%
Formula
Percentage change = [(159 - 686) / 686] x 100
Subtract the new number by the original number
159 - 686 = -527
-527 ÷ 686 = -0.7682215743440233
-0.7682215743440233 x 100 = -76.82%