-30.52% is the change from 439 to 305
Calculation steps:
[( 305 - 439 ) ÷ 439] x 100 = -30.52%
Formula
Percentage change = [(305 - 439) / 439] x 100
Subtract the new number by the original number
305 - 439 = -134
-134 ÷ 439 = -0.3052391799544419
-0.3052391799544419 x 100 = -30.52%