-90.92% is the change from 980 to 89
Calculation steps:
[( 89 - 980 ) ÷ 980] x 100 = -90.92%
Formula
Percentage change = [(89 - 980) / 980] x 100
Subtract the new number by the original number
89 - 980 = -891
-891 ÷ 980 = -0.9091836734693878
-0.9091836734693878 x 100 = -90.92%