-25.23% is the change from 428 to 320
Calculation steps:
[( 320 - 428 ) ÷ 428] x 100 = -25.23%
Formula
Percentage change = [(320 - 428) / 428] x 100
Subtract the new number by the original number
320 - 428 = -108
-108 ÷ 428 = -0.2523364485981308
-0.2523364485981308 x 100 = -25.23%