-25.58% is the change from 172 to 128
Calculation steps:
[( 128 - 172 ) ÷ 172] x 100 = -25.58%
Formula
Percentage change = [(128 - 172) / 172] x 100
Subtract the new number by the original number
128 - 172 = -44
-44 ÷ 172 = -0.2558139534883721
-0.2558139534883721 x 100 = -25.58%