-89.62% is the change from 867 to 90
Calculation steps:
[( 90 - 867 ) ÷ 867] x 100 = -89.62%
Formula
Percentage change = [(90 - 867) / 867] x 100
Subtract the new number by the original number
90 - 867 = -777
-777 ÷ 867 = -0.8961937716262975
-0.8961937716262975 x 100 = -89.62%