-28.49% is the change from 172 to 123
Calculation steps:
[( 123 - 172 ) ÷ 172] x 100 = -28.49%
Formula
Percentage change = [(123 - 172) / 172] x 100
Subtract the new number by the original number
123 - 172 = -49
-49 ÷ 172 = -0.28488372093023256
-0.28488372093023256 x 100 = -28.49%