-74.64% is the change from 911 to 231
Calculation steps:
[( 231 - 911 ) ÷ 911] x 100 = -74.64%
Formula
Percentage change = [(231 - 911) / 911] x 100
Subtract the new number by the original number
231 - 911 = -680
-680 ÷ 911 = -0.7464324917672887
-0.7464324917672887 x 100 = -74.64%