-88.78% is the change from 909 to 102
Calculation steps:
[( 102 - 909 ) ÷ 909] x 100 = -88.78%
Formula
Percentage change = [(102 - 909) / 909] x 100
Subtract the new number by the original number
102 - 909 = -807
-807 ÷ 909 = -0.8877887788778878
-0.8877887788778878 x 100 = -88.78%