18.6% is the change from 129 to 153
Calculation steps:
[( 153 - 129 ) ÷ 129] x 100 = 18.6%
Formula
Percentage change = [(153 - 129) / 129] x 100
Subtract the new number by the original number
153 - 129 = 24
24 ÷ 129 = 0.18604651162790697
0.18604651162790697 x 100 = 18.6%