-39.23% is the change from 339 to 206
Calculation steps:
[( 206 - 339 ) ÷ 339] x 100 = -39.23%
Formula
Percentage change = [(206 - 339) / 339] x 100
Subtract the new number by the original number
206 - 339 = -133
-133 ÷ 339 = -0.39233038348082594
-0.39233038348082594 x 100 = -39.23%