-0.23% is the change from 428 to 427
Calculation steps:
[( 427 - 428 ) ÷ 428] x 100 = -0.23%
Formula
Percentage change = [(427 - 428) / 428] x 100
Subtract the new number by the original number
427 - 428 = -1
-1 ÷ 428 = -0.002336448598130841
-0.002336448598130841 x 100 = -0.23%