-50.61% is the change from 909 to 449
Calculation steps:
[( 449 - 909 ) ÷ 909] x 100 = -50.61%
Formula
Percentage change = [(449 - 909) / 909] x 100
Subtract the new number by the original number
449 - 909 = -460
-460 ÷ 909 = -0.506050605060506
-0.506050605060506 x 100 = -50.61%