-56.86% is the change from 911 to 393
Calculation steps:
[( 393 - 911 ) ÷ 911] x 100 = -56.86%
Formula
Percentage change = [(393 - 911) / 911] x 100
Subtract the new number by the original number
393 - 911 = -518
-518 ÷ 911 = -0.5686059275521405
-0.5686059275521405 x 100 = -56.86%