-16.77% is the change from 155 to 129
Calculation steps:
[( 129 - 155 ) ÷ 155] x 100 = -16.77%
Formula
Percentage change = [(129 - 155) / 155] x 100
Subtract the new number by the original number
129 - 155 = -26
-26 ÷ 155 = -0.16774193548387098
-0.16774193548387098 x 100 = -16.77%