-21.16% is the change from 430 to 339
Calculation steps:
[( 339 - 430 ) ÷ 430] x 100 = -21.16%
Formula
Percentage change = [(339 - 430) / 430] x 100
Subtract the new number by the original number
339 - 430 = -91
-91 ÷ 430 = -0.2116279069767442
-0.2116279069767442 x 100 = -21.16%