-28.61% is the change from 339 to 242
Calculation steps:
[( 242 - 339 ) ÷ 339] x 100 = -28.61%
Formula
Percentage change = [(242 - 339) / 339] x 100
Subtract the new number by the original number
242 - 339 = -97
-97 ÷ 339 = -0.2861356932153392
-0.2861356932153392 x 100 = -28.61%