-79.37% is the change from 189 to 39
Calculation steps:
[( 39 - 189 ) ÷ 189] x 100 = -79.37%
Formula
Percentage change = [(39 - 189) / 189] x 100
Subtract the new number by the original number
39 - 189 = -150
-150 ÷ 189 = -0.7936507936507936
-0.7936507936507936 x 100 = -79.37%