-8.39% is the change from 155 to 142
Calculation steps:
[( 142 - 155 ) ÷ 155] x 100 = -8.39%
Formula
Percentage change = [(142 - 155) / 155] x 100
Subtract the new number by the original number
142 - 155 = -13
-13 ÷ 155 = -0.08387096774193549
-0.08387096774193549 x 100 = -8.39%