-90.83% is the change from 981 to 90
Calculation steps:
[( 90 - 981 ) ÷ 981] x 100 = -90.83%
Formula
Percentage change = [(90 - 981) / 981] x 100
Subtract the new number by the original number
90 - 981 = -891
-891 ÷ 981 = -0.908256880733945
-0.908256880733945 x 100 = -90.83%