-87.22% is the change from 673 to 86
Calculation steps:
[( 86 - 673 ) ÷ 673] x 100 = -87.22%
Formula
Percentage change = [(86 - 673) / 673] x 100
Subtract the new number by the original number
86 - 673 = -587
-587 ÷ 673 = -0.8722139673105498
-0.8722139673105498 x 100 = -87.22%