-10.81% is the change from 111 to 99
Calculation steps:
[( 99 - 111 ) ÷ 111] x 100 = -10.81%
Formula
Percentage change = [(99 - 111) / 111] x 100
Subtract the new number by the original number
99 - 111 = -12
-12 ÷ 111 = -0.10810810810810811
-0.10810810810810811 x 100 = -10.81%