12.12% is the change from 99 to 111
Calculation steps:
[( 111 - 99 ) ÷ 99] x 100 = 12.12%
Formula
Percentage change = [(111 - 99) / 99] x 100
Subtract the new number by the original number
111 - 99 = 12
12 ÷ 99 = 0.12121212121212122
0.12121212121212122 x 100 = 12.12%