18.18% is the change from 11 to 13
Calculation steps:
[( 13 - 11 ) ÷ 11] x 100 = 18.18%
Formula
Percentage change = [(13 - 11) / 11] x 100
Subtract the new number by the original number
13 - 11 = 2
2 ÷ 11 = 0.18181818181818182
0.18181818181818182 x 100 = 18.18%