-10.03% is the change from 339 to 305
Calculation steps:
[( 305 - 339 ) ÷ 339] x 100 = -10.03%
Formula
Percentage change = [(305 - 339) / 339] x 100
Subtract the new number by the original number
305 - 339 = -34
-34 ÷ 339 = -0.10029498525073746
-0.10029498525073746 x 100 = -10.03%