-55.43% is the change from 911 to 406
Calculation steps:
[( 406 - 911 ) ÷ 911] x 100 = -55.43%
Formula
Percentage change = [(406 - 911) / 911] x 100
Subtract the new number by the original number
406 - 911 = -505
-505 ÷ 911 = -0.5543358946212953
-0.5543358946212953 x 100 = -55.43%