-77.01% is the change from 909 to 209
Calculation steps:
[( 209 - 909 ) ÷ 909] x 100 = -77.01%
Formula
Percentage change = [(209 - 909) / 909] x 100
Subtract the new number by the original number
209 - 909 = -700
-700 ÷ 909 = -0.77007700770077
-0.77007700770077 x 100 = -77.01%