-72.9% is the change from 155 to 42
Calculation steps:
[( 42 - 155 ) ÷ 155] x 100 = -72.9%
Formula
Percentage change = [(42 - 155) / 155] x 100
Subtract the new number by the original number
42 - 155 = -113
-113 ÷ 155 = -0.7290322580645161
-0.7290322580645161 x 100 = -72.9%