-89.07% is the change from 906 to 99
Calculation steps:
[( 99 - 906 ) ÷ 906] x 100 = -89.07%
Formula
Percentage change = [(99 - 906) / 906] x 100
Subtract the new number by the original number
99 - 906 = -807
-807 ÷ 906 = -0.890728476821192
-0.890728476821192 x 100 = -89.07%