-55.01% is the change from 909 to 409
Calculation steps:
[( 409 - 909 ) ÷ 909] x 100 = -55.01%
Formula
Percentage change = [(409 - 909) / 909] x 100
Subtract the new number by the original number
409 - 909 = -500
-500 ÷ 909 = -0.5500550055005501
-0.5500550055005501 x 100 = -55.01%