20.18% is the change from 109 to 131
Calculation steps:
[( 131 - 109 ) ÷ 109] x 100 = 20.18%
Formula
Percentage change = [(131 - 109) / 109] x 100
Subtract the new number by the original number
131 - 109 = 22
22 ÷ 109 = 0.2018348623853211
0.2018348623853211 x 100 = 20.18%