9.09% is the change from 11 to 12
Calculation steps:
[( 12 - 11 ) ÷ 11] x 100 = 9.09%
Formula
Percentage change = [(12 - 11) / 11] x 100
Subtract the new number by the original number
12 - 11 = 1
1 ÷ 11 = 0.09090909090909091
0.09090909090909091 x 100 = 9.09%