-81.07% is the change from 206 to 39
Calculation steps:
[( 39 - 206 ) ÷ 206] x 100 = -81.07%
Formula
Percentage change = [(39 - 206) / 206] x 100
Subtract the new number by the original number
39 - 206 = -167
-167 ÷ 206 = -0.8106796116504854
-0.8106796116504854 x 100 = -81.07%