-87.9% is the change from 711 to 86
Calculation steps:
[( 86 - 711 ) ÷ 711] x 100 = -87.9%
Formula
Percentage change = [(86 - 711) / 711] x 100
Subtract the new number by the original number
86 - 711 = -625
-625 ÷ 711 = -0.8790436005625879
-0.8790436005625879 x 100 = -87.9%