-50.39% is the change from 905 to 449
Calculation steps:
[( 449 - 905 ) ÷ 905] x 100 = -50.39%
Formula
Percentage change = [(449 - 905) / 905] x 100
Subtract the new number by the original number
449 - 905 = -456
-456 ÷ 905 = -0.5038674033149171
-0.5038674033149171 x 100 = -50.39%