-9.91% is the change from 111 to 100
Calculation steps:
[( 100 - 111 ) ÷ 111] x 100 = -9.91%
Formula
Percentage change = [(100 - 111) / 111] x 100
Subtract the new number by the original number
100 - 111 = -11
-11 ÷ 111 = -0.0990990990990991
-0.0990990990990991 x 100 = -9.91%