-99.12% is the change from 909 to 8
Calculation steps:
[( 8 - 909 ) ÷ 909] x 100 = -99.12%
Formula
Percentage change = [(8 - 909) / 909] x 100
Subtract the new number by the original number
8 - 909 = -901
-901 ÷ 909 = -0.9911991199119912
-0.9911991199119912 x 100 = -99.12%