-68.8% is the change from 125 to 39
Calculation steps:
[( 39 - 125 ) ÷ 125] x 100 = -68.8%
Formula
Percentage change = [(39 - 125) / 125] x 100
Subtract the new number by the original number
39 - 125 = -86
-86 ÷ 125 = -0.688
-0.688 x 100 = -68.8%
Example