-50.05% is the change from 911 to 455
Calculation steps:
[( 455 - 911 ) ÷ 911] x 100 = -50.05%
Formula
Percentage change = [(455 - 911) / 911] x 100
Subtract the new number by the original number
455 - 911 = -456
-456 ÷ 911 = -0.5005488474204172
-0.5005488474204172 x 100 = -50.05%