-25.58% is the change from 430 to 320
Calculation steps:
[( 320 - 430 ) ÷ 430] x 100 = -25.58%
Formula
Percentage change = [(320 - 430) / 430] x 100
Subtract the new number by the original number
320 - 430 = -110
-110 ÷ 430 = -0.2558139534883721
-0.2558139534883721 x 100 = -25.58%