-98.79% is the change from 909 to 11
Calculation steps:
[( 11 - 909 ) ÷ 909] x 100 = -98.79%
Formula
Percentage change = [(11 - 909) / 909] x 100
Subtract the new number by the original number
11 - 909 = -898
-898 ÷ 909 = -0.9878987898789879
-0.9878987898789879 x 100 = -98.79%