-49.95% is the change from 911 to 456
Calculation steps:
[( 456 - 911 ) ÷ 911] x 100 = -49.95%
Formula
Percentage change = [(456 - 911) / 911] x 100
Subtract the new number by the original number
456 - 911 = -455
-455 ÷ 911 = -0.4994511525795829
-0.4994511525795829 x 100 = -49.95%