-20.65% is the change from 155 to 123
Calculation steps:
[( 123 - 155 ) ÷ 155] x 100 = -20.65%
Formula
Percentage change = [(123 - 155) / 155] x 100
Subtract the new number by the original number
123 - 155 = -32
-32 ÷ 155 = -0.2064516129032258
-0.2064516129032258 x 100 = -20.65%