-89.52% is the change from 859 to 90
Calculation steps:
[( 90 - 859 ) ÷ 859] x 100 = -89.52%
Formula
Percentage change = [(90 - 859) / 859] x 100
Subtract the new number by the original number
90 - 859 = -769
-769 ÷ 859 = -0.8952270081490105
-0.8952270081490105 x 100 = -89.52%