-29.66% is the change from 435 to 306
Calculation steps:
[( 306 - 435 ) ÷ 435] x 100 = -29.66%
Formula
Percentage change = [(306 - 435) / 435] x 100
Subtract the new number by the original number
306 - 435 = -129
-129 ÷ 435 = -0.296551724137931
-0.296551724137931 x 100 = -29.66%