-89.39% is the change from 933 to 99
Calculation steps:
[( 99 - 933 ) ÷ 933] x 100 = -89.39%
Formula
Percentage change = [(99 - 933) / 933] x 100
Subtract the new number by the original number
99 - 933 = -834
-834 ÷ 933 = -0.8938906752411575
-0.8938906752411575 x 100 = -89.39%