-88.01% is the change from 909 to 109
Calculation steps:
[( 109 - 909 ) ÷ 909] x 100 = -88.01%
Formula
Percentage change = [(109 - 909) / 909] x 100
Subtract the new number by the original number
109 - 909 = -800
-800 ÷ 909 = -0.8800880088008801
-0.8800880088008801 x 100 = -88.01%