-89.91% is the change from 981 to 99
Calculation steps:
[( 99 - 981 ) ÷ 981] x 100 = -89.91%
Formula
Percentage change = [(99 - 981) / 981] x 100
Subtract the new number by the original number
99 - 981 = -882
-882 ÷ 981 = -0.8990825688073395
-0.8990825688073395 x 100 = -89.91%