-49.94% is the change from 909 to 455
Calculation steps:
[( 455 - 909 ) ÷ 909] x 100 = -49.94%
Formula
Percentage change = [(455 - 909) / 909] x 100
Subtract the new number by the original number
455 - 909 = -454
-454 ÷ 909 = -0.49944994499449946
-0.49944994499449946 x 100 = -49.94%