20.59% is the change from 136 to 164
Calculation steps:
[( 164 - 136 ) ÷ 136] x 100 = 20.59%
Formula
Percentage change = [(164 - 136) / 136] x 100
Subtract the new number by the original number
164 - 136 = 28
28 ÷ 136 = 0.20588235294117646
0.20588235294117646 x 100 = 20.59%