-28.97% is the change from 435 to 309
Calculation steps:
[( 309 - 435 ) ÷ 435] x 100 = -28.97%
Formula
Percentage change = [(309 - 435) / 435] x 100
Subtract the new number by the original number
309 - 435 = -126
-126 ÷ 435 = -0.2896551724137931
-0.2896551724137931 x 100 = -28.97%