-13.55% is the change from 155 to 134
Calculation steps:
[( 134 - 155 ) ÷ 155] x 100 = -13.55%
Formula
Percentage change = [(134 - 155) / 155] x 100
Subtract the new number by the original number
134 - 155 = -21
-21 ÷ 155 = -0.13548387096774195
-0.13548387096774195 x 100 = -13.55%