-20.23% is the change from 430 to 343
Calculation steps:
[( 343 - 430 ) ÷ 430] x 100 = -20.23%
Formula
Percentage change = [(343 - 430) / 430] x 100
Subtract the new number by the original number
343 - 430 = -87
-87 ÷ 430 = -0.20232558139534884
-0.20232558139534884 x 100 = -20.23%