-12.58% is the change from 159 to 139
Calculation steps:
[( 139 - 159 ) ÷ 159] x 100 = -12.58%
Formula
Percentage change = [(139 - 159) / 159] x 100
Subtract the new number by the original number
139 - 159 = -20
-20 ÷ 159 = -0.12578616352201258
-0.12578616352201258 x 100 = -12.58%