-90.54% is the change from 909 to 86
Calculation steps:
[( 86 - 909 ) ÷ 909] x 100 = -90.54%
Formula
Percentage change = [(86 - 909) / 909] x 100
Subtract the new number by the original number
86 - 909 = -823
-823 ÷ 909 = -0.9053905390539054
-0.9053905390539054 x 100 = -90.54%