-71.79% is the change from 911 to 257
Calculation steps:
[( 257 - 911 ) ÷ 911] x 100 = -71.79%
Formula
Percentage change = [(257 - 911) / 911] x 100
Subtract the new number by the original number
257 - 911 = -654
-654 ÷ 911 = -0.7178924259055982
-0.7178924259055982 x 100 = -71.79%