-80.58% is the change from 206 to 40
Calculation steps:
[( 40 - 206 ) ÷ 206] x 100 = -80.58%
Formula
Percentage change = [(40 - 206) / 206] x 100
Subtract the new number by the original number
40 - 206 = -166
-166 ÷ 206 = -0.8058252427184466
-0.8058252427184466 x 100 = -80.58%