-29.5% is the change from 339 to 239
Calculation steps:
[( 239 - 339 ) ÷ 339] x 100 = -29.5%
Formula
Percentage change = [(239 - 339) / 339] x 100
Subtract the new number by the original number
239 - 339 = -100
-100 ÷ 339 = -0.2949852507374631
-0.2949852507374631 x 100 = -29.5%