-2.52% is the change from 911 to 888
Calculation steps:
[( 888 - 911 ) ÷ 911] x 100 = -2.52%
Formula
Percentage change = [(888 - 911) / 911] x 100
Subtract the new number by the original number
888 - 911 = -23
-23 ÷ 911 = -0.025246981339187707
-0.025246981339187707 x 100 = -2.52%