-30.65% is the change from 620 to 430
Calculation steps:
[( 430 - 620 ) ÷ 620] x 100 = -30.65%
Formula
Percentage change = [(430 - 620) / 620] x 100
Subtract the new number by the original number
430 - 620 = -190
-190 ÷ 620 = -0.3064516129032258
-0.3064516129032258 x 100 = -30.65%