-39.82% is the change from 339 to 204
Calculation steps:
[( 204 - 339 ) ÷ 339] x 100 = -39.82%
Formula
Percentage change = [(204 - 339) / 339] x 100
Subtract the new number by the original number
204 - 339 = -135
-135 ÷ 339 = -0.39823008849557523
-0.39823008849557523 x 100 = -39.82%