-89.77% is the change from 909 to 93
Calculation steps:
[( 93 - 909 ) ÷ 909] x 100 = -89.77%
Formula
Percentage change = [(93 - 909) / 909] x 100
Subtract the new number by the original number
93 - 909 = -816
-816 ÷ 909 = -0.8976897689768977
-0.8976897689768977 x 100 = -89.77%