-71.79% is the change from 39 to 11
Calculation steps:
[( 11 - 39 ) ÷ 39] x 100 = -71.79%
Formula
Percentage change = [(11 - 39) / 39] x 100
Subtract the new number by the original number
11 - 39 = -28
-28 ÷ 39 = -0.717948717948718
-0.717948717948718 x 100 = -71.79%