-9.14% is the change from 339 to 308
Calculation steps:
[( 308 - 339 ) ÷ 339] x 100 = -9.14%
Formula
Percentage change = [(308 - 339) / 339] x 100
Subtract the new number by the original number
308 - 339 = -31
-31 ÷ 339 = -0.09144542772861357
-0.09144542772861357 x 100 = -9.14%