-69.26% is the change from 911 to 280
Calculation steps:
[( 280 - 911 ) ÷ 911] x 100 = -69.26%
Formula
Percentage change = [(280 - 911) / 911] x 100
Subtract the new number by the original number
280 - 911 = -631
-631 ÷ 911 = -0.6926454445664105
-0.6926454445664105 x 100 = -69.26%